Service refactor (#153)

* remove email out of register service

* Update auth service, move JWT handling out of controller

* add docker config for service auth test

* Update mock email system

* Format: ./src/Core/Service

* Refactor authentication payloads and services for registration and login processes

* Format: src/Core/API, src/Core/Service

docker-compose.test.yaml

@@ -112,6 +112,26 @@ services:
     networks:
       - testnet
 
+  service.auth.tests:
+    env_file: ".env.test"
+    image: service.auth.tests
+    container_name: test-env-service-auth-tests
+    depends_on:
+      database.seed:
+        condition: service_completed_successfully
+    build:
+      context: ./src/Core
+      dockerfile: Service/Service.Auth.Tests/Dockerfile
+      args:
+        BUILD_CONFIGURATION: Release
+    environment:
+      DOTNET_RUNNING_IN_CONTAINER: "true"
+    volumes:
+      - ./test-results:/app/test-results
+    restart: "no"
+    networks:
+      - testnet
+
 volumes:
   sqlserverdata-test:
     driver: local

src/Core/API/API.Core/API.Core.csproj

@@ -20,12 +20,9 @@
   <ItemGroup>
     <ProjectReference Include="..\..\Domain.Entities\Domain.Entities.csproj" />
     <ProjectReference Include="..\..\Domain.Exceptions\Domain.Exceptions.csproj" />
-    <ProjectReference
-      Include="..\..\Infrastructure\Infrastructure.Email\Infrastructure.Email.csproj" />
-    <ProjectReference
-      Include="..\..\Infrastructure\Infrastructure.Email.Templates\Infrastructure.Email.Templates.csproj" />
-    <ProjectReference
-      Include="..\..\Infrastructure\Infrastructure.Repository\Infrastructure.Repository.csproj" />
+    <ProjectReference Include="..\..\Infrastructure\Infrastructure.Email\Infrastructure.Email.csproj" />
+    <ProjectReference Include="..\..\Infrastructure\Infrastructure.Email.Templates\Infrastructure.Email.Templates.csproj" />
+    <ProjectReference Include="..\..\Infrastructure\Infrastructure.Repository\Infrastructure.Repository.csproj" />
     <ProjectReference Include="..\..\Infrastructure\Infrastructure.Jwt\Infrastructure.Jwt.csproj" />
     <ProjectReference Include="..\..\Service\Service.Auth\Service.Auth.csproj" />
     <ProjectReference Include="..\..\Service\Service.UserManagement\Service.UserManagement.csproj" />

src/Core/API/API.Core/Contracts/Auth/AuthDTO.cs

@@ -1,4 +1,19 @@
+using Domain.Entities;
+using Org.BouncyCastle.Asn1.Cms;
+
 namespace API.Core.Contracts.Auth;
 
-public record UserDTO(Guid UserAccountId, string Username);
-public record AuthPayload(UserDTO User, string AccessToken, DateTime CreatedAt, DateTime ExpiresAt);
+public record LoginPayload(
+    Guid UserAccountId,
+    string Username,
+    string RefreshToken,
+    string AccessToken
+);
+
+public record RegistrationPayload(
+    Guid UserAccountId,
+    string Username,
+    string RefreshToken,
+    string AccessToken,
+    bool ConfirmationEmailSent
+);

src/Core/API/API.Core/Contracts/Auth/Login.cs

@@ -13,11 +13,8 @@ public class LoginRequestValidator : AbstractValidator<LoginRequest>
 {
     public LoginRequestValidator()
     {
-      RuleFor(x => x.Username)
-          .NotEmpty().WithMessage("Username is required");
+        RuleFor(x => x.Username).NotEmpty().WithMessage("Username is required");
 
-      RuleFor(x => x.Password)
-          .NotEmpty().WithMessage("Password is required");
+        RuleFor(x => x.Password).NotEmpty().WithMessage("Password is required");
     }
 }
-

src/Core/API/API.Core/Contracts/Auth/Register.cs

@@ -17,38 +17,55 @@ public class RegisterRequestValidator : AbstractValidator<RegisterRequest>
     public RegisterRequestValidator()
     {
         RuleFor(x => x.Username)
-            .NotEmpty().WithMessage("Username is required")
-            .Length(3, 64).WithMessage("Username must be between 3 and 64 characters")
+            .NotEmpty()
+            .WithMessage("Username is required")
+            .Length(3, 64)
+            .WithMessage("Username must be between 3 and 64 characters")
             .Matches("^[a-zA-Z0-9._-]+$")
-            .WithMessage("Username can only contain letters, numbers, dots, underscores, and hyphens");
+            .WithMessage(
+                "Username can only contain letters, numbers, dots, underscores, and hyphens"
+            );
 
         RuleFor(x => x.FirstName)
-            .NotEmpty().WithMessage("First name is required")
-            .MaximumLength(128).WithMessage("First name cannot exceed 128 characters");
+            .NotEmpty()
+            .WithMessage("First name is required")
+            .MaximumLength(128)
+            .WithMessage("First name cannot exceed 128 characters");
 
         RuleFor(x => x.LastName)
-            .NotEmpty().WithMessage("Last name is required")
-            .MaximumLength(128).WithMessage("Last name cannot exceed 128 characters");
+            .NotEmpty()
+            .WithMessage("Last name is required")
+            .MaximumLength(128)
+            .WithMessage("Last name cannot exceed 128 characters");
 
         RuleFor(x => x.Email)
-            .NotEmpty().WithMessage("Email is required")
-            .EmailAddress().WithMessage("Invalid email format")
-            .MaximumLength(128).WithMessage("Email cannot exceed 128 characters");
+            .NotEmpty()
+            .WithMessage("Email is required")
+            .EmailAddress()
+            .WithMessage("Invalid email format")
+            .MaximumLength(128)
+            .WithMessage("Email cannot exceed 128 characters");
 
         RuleFor(x => x.DateOfBirth)
-            .NotEmpty().WithMessage("Date of birth is required")
+            .NotEmpty()
+            .WithMessage("Date of birth is required")
             .LessThan(DateTime.Today.AddYears(-19))
             .WithMessage("You must be at least 19 years old to register");
 
         RuleFor(x => x.Password)
-            .NotEmpty().WithMessage("Password is required")
-            .MinimumLength(8).WithMessage("Password must be at least 8 characters")
-            .Matches("[A-Z]").WithMessage("Password must contain at least one uppercase letter")
-            .Matches("[a-z]").WithMessage("Password must contain at least one lowercase letter")
-            .Matches("[0-9]").WithMessage("Password must contain at least one number")
-            .Matches("[^a-zA-Z0-9]").WithMessage("Password must contain at least one special character");
+            .NotEmpty()
+            .WithMessage("Password is required")
+            .MinimumLength(8)
+            .WithMessage("Password must be at least 8 characters")
+            .Matches("[A-Z]")
+            .WithMessage("Password must contain at least one uppercase letter")
+            .Matches("[a-z]")
+            .WithMessage("Password must contain at least one lowercase letter")
+            .Matches("[0-9]")
+            .WithMessage("Password must contain at least one number")
+            .Matches("[^a-zA-Z0-9]")
+            .WithMessage(
+                "Password must contain at least one special character"
+            );
     }
 }
-
-
-

src/Core/API/API.Core/Controllers/AuthController.cs

@@ -1,7 +1,6 @@
 using API.Core.Contracts.Auth;
 using API.Core.Contracts.Common;
 using Domain.Entities;
-using Infrastructure.Jwt;
 using Microsoft.AspNetCore.Mvc;
 using Service.Auth;
 
@@ -9,33 +8,37 @@ namespace API.Core.Controllers
 {
     [ApiController]
     [Route("api/[controller]")]
-    public class AuthController(IRegisterService register, ILoginService login, ITokenInfrastructure tokenInfrastructure) : ControllerBase
+    public class AuthController(IRegisterService register, ILoginService login)
+        : ControllerBase
     {
         [HttpPost("register")]
-        public async Task<ActionResult<UserAccount>> Register([FromBody] RegisterRequest req)
+        public async Task<ActionResult<UserAccount>> Register(
+            [FromBody] RegisterRequest req
+        )
         {
-            var created = await register.RegisterAsync(new UserAccount
+            var rtn = await register.RegisterAsync(
+                new UserAccount
                 {
                     UserAccountId = Guid.Empty,
                     Username = req.Username,
                     FirstName = req.FirstName,
                     LastName = req.LastName,
                     Email = req.Email,
-                DateOfBirth = req.DateOfBirth
-            }, req.Password);
-
-            var jwtExpiresAt = DateTime.UtcNow.AddHours(1);
-            var jwt = tokenInfrastructure.GenerateJwt(created.UserAccountId, created.Username, jwtExpiresAt
+                    DateOfBirth = req.DateOfBirth,
+                },
+                req.Password
             );
 
-            var response = new ResponseBody<AuthPayload>
+            var response = new ResponseBody<RegistrationPayload>
             {
                 Message = "User registered successfully.",
-                Payload = new AuthPayload(
-                    new UserDTO(created.UserAccountId, created.Username),
-                    jwt,
-                    DateTime.UtcNow,
-                    jwtExpiresAt)
+                Payload = new RegistrationPayload(
+                    rtn.UserAccount.UserAccountId,
+                    rtn.UserAccount.Username,
+                    rtn.RefreshToken,
+                    rtn.AccessToken,
+                    rtn.EmailSent
+                ),
             };
             return Created("/", response);
         }
@@ -43,18 +46,20 @@ namespace API.Core.Controllers
         [HttpPost("login")]
         public async Task<ActionResult> Login([FromBody] LoginRequest req)
         {
-            var userAccount = await login.LoginAsync(req.Username, req.Password);
+            var rtn = await login.LoginAsync(req.Username, req.Password);
 
-            UserDTO dto = new(userAccount.UserAccountId, userAccount.Username);
-
-            var jwtExpiresAt = DateTime.UtcNow.AddHours(1);
-            var jwt = tokenInfrastructure.GenerateJwt(userAccount.UserAccountId, userAccount.Username, jwtExpiresAt);
-
-            return Ok(new ResponseBody<AuthPayload>
+            return Ok(
+                new ResponseBody<LoginPayload>
                 {
                     Message = "Logged in successfully.",
-                Payload = new AuthPayload(dto, jwt, DateTime.UtcNow, jwtExpiresAt)
-            });
+                    Payload = new LoginPayload(
+                        rtn.UserAccount.UserAccountId,
+                        rtn.UserAccount.Username,
+                        rtn.RefreshToken,
+                        rtn.AccessToken
+                    ),
+                }
+            );
         }
     }
 }

src/Core/API/API.Core/Controllers/UserController.cs

@@ -9,7 +9,10 @@ namespace API.Core.Controllers
     public class UserController(IUserService userService) : ControllerBase
     {
         [HttpGet]
-        public async Task<ActionResult<IEnumerable<UserAccount>>> GetAll([FromQuery] int? limit, [FromQuery] int? offset)
+        public async Task<ActionResult<IEnumerable<UserAccount>>> GetAll(
+            [FromQuery] int? limit,
+            [FromQuery] int? offset
+        )
         {
             var users = await userService.GetAllAsync(limit, offset);
             return Ok(users);

src/Core/API/API.Core/GlobalException.cs

@@ -8,7 +8,8 @@ using Microsoft.AspNetCore.Mvc.Filters;
 
 namespace API.Core;
 
-public class GlobalExceptionFilter(ILogger<GlobalExceptionFilter> logger) : IExceptionFilter
+public class GlobalExceptionFilter(ILogger<GlobalExceptionFilter> logger)
+    : IExceptionFilter
 {
     public void OnException(ExceptionContext context)
     {
@@ -17,65 +18,78 @@ public class GlobalExceptionFilter(ILogger<GlobalExceptionFilter> logger) : IExc
         switch (context.Exception)
         {
             case FluentValidation.ValidationException fluentValidationException:
-                var errors = fluentValidationException.Errors
-                    .GroupBy(e => e.PropertyName)
+                var errors = fluentValidationException
+                    .Errors.GroupBy(e => e.PropertyName)
                     .ToDictionary(
                         g => g.Key,
                         g => g.Select(e => e.ErrorMessage).ToArray()
                     );
 
-                context.Result = new BadRequestObjectResult(new
-                {
-                    message = "Validation failed",
-                    errors
-                });
+                context.Result = new BadRequestObjectResult(
+                    new { message = "Validation failed", errors }
+                );
                 context.ExceptionHandled = true;
                 break;
 
             case ConflictException ex:
-                context.Result = new ObjectResult(new ResponseBody { Message = ex.Message })
+                context.Result = new ObjectResult(
+                    new ResponseBody { Message = ex.Message }
+                )
                 {
-                    StatusCode = 409
+                    StatusCode = 409,
                 };
                 context.ExceptionHandled = true;
                 break;
 
             case NotFoundException ex:
-                context.Result = new ObjectResult(new ResponseBody { Message = ex.Message })
+                context.Result = new ObjectResult(
+                    new ResponseBody { Message = ex.Message }
+                )
                 {
-                    StatusCode = 404
+                    StatusCode = 404,
                 };
                 context.ExceptionHandled = true;
                 break;
 
             case UnauthorizedException ex:
-                context.Result = new ObjectResult(new ResponseBody { Message = ex.Message })
+                context.Result = new ObjectResult(
+                    new ResponseBody { Message = ex.Message }
+                )
                 {
-                    StatusCode = 401
+                    StatusCode = 401,
                 };
                 context.ExceptionHandled = true;
                 break;
 
             case ForbiddenException ex:
-                context.Result = new ObjectResult(new ResponseBody { Message = ex.Message })
+                context.Result = new ObjectResult(
+                    new ResponseBody { Message = ex.Message }
+                )
                 {
-                    StatusCode = 403
+                    StatusCode = 403,
                 };
                 context.ExceptionHandled = true;
                 break;
 
             case Domain.Exceptions.ValidationException ex:
-                context.Result = new ObjectResult(new ResponseBody { Message = ex.Message })
+                context.Result = new ObjectResult(
+                    new ResponseBody { Message = ex.Message }
+                )
                 {
-                    StatusCode = 400
+                    StatusCode = 400,
                 };
                 context.ExceptionHandled = true;
                 break;
 
             default:
-                context.Result = new ObjectResult(new ResponseBody { Message = "An unexpected error occurred" })
+                context.Result = new ObjectResult(
+                    new ResponseBody
                     {
-                    StatusCode = 500
+                        Message = "An unexpected error occurred",
+                    }
+                )
+                {
+                    StatusCode = 500,
                 };
                 context.ExceptionHandled = true;
                 break;

src/Core/API/API.Core/Program.cs

@@ -1,7 +1,11 @@
 using API.Core;
+using API.Core.Contracts.Common;
 using Domain.Exceptions;
 using FluentValidation;
 using FluentValidation.AspNetCore;
+using Infrastructure.Email;
+using Infrastructure.Email.Templates;
+using Infrastructure.Email.Templates.Rendering;
 using Infrastructure.Jwt;
 using Infrastructure.PasswordHashing;
 using Infrastructure.Repository.Auth;
@@ -9,12 +13,8 @@ using Infrastructure.Repository.Sql;
 using Infrastructure.Repository.UserAccount;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.Mvc.Filters;
-using Service.UserManagement.User;
-using API.Core.Contracts.Common;
-using Infrastructure.Email;
-using Infrastructure.Email.Templates;
-using Infrastructure.Email.Templates.Rendering;
 using Service.Auth;
+using Service.UserManagement.User;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -45,7 +45,10 @@ if (!builder.Environment.IsProduction())
 
 // Configure Dependency Injection -------------------------------------------------------------------------------------
 
-builder.Services.AddSingleton<ISqlConnectionFactory, DefaultSqlConnectionFactory>();
+builder.Services.AddSingleton<
+    ISqlConnectionFactory,
+    DefaultSqlConnectionFactory
+>();
 
 builder.Services.AddScoped<IUserAccountRepository, UserAccountRepository>();
 builder.Services.AddScoped<IAuthRepository, AuthRepository>();
@@ -53,6 +56,7 @@ builder.Services.AddScoped<IAuthRepository, AuthRepository>();
 builder.Services.AddScoped<IUserService, UserService>();
 builder.Services.AddScoped<ILoginService, LoginService>();
 builder.Services.AddScoped<IRegisterService, RegisterService>();
+builder.Services.AddScoped<ITokenService, TokenService>();
 
 builder.Services.AddScoped<ITokenInfrastructure, JwtInfrastructure>();
 builder.Services.AddScoped<IPasswordInfrastructure, Argon2Infrastructure>();

src/Core/API/API.Specs/API.Specs.csproj

@@ -17,11 +17,17 @@
     <!-- Reqnroll core, xUnit adapter and code-behind generator -->
     <PackageReference Include="Reqnroll" Version="3.3.3" />
     <PackageReference Include="Reqnroll.xUnit" Version="3.3.3" />
-    <PackageReference Include="Reqnroll.Tools.MsBuild.Generation" Version="3.3.3"
-      PrivateAssets="all" />
+    <PackageReference
+      Include="Reqnroll.Tools.MsBuild.Generation"
+      Version="3.3.3"
+      PrivateAssets="all"
+    />
 
     <!-- ASP.NET Core integration testing -->
-    <PackageReference Include="Microsoft.AspNetCore.Mvc.Testing" Version="9.0.1" />
+    <PackageReference
+      Include="Microsoft.AspNetCore.Mvc.Testing"
+      Version="9.0.1"
+    />
   </ItemGroup>
 
   <ItemGroup>
@@ -35,7 +41,6 @@
 
   <ItemGroup>
     <ProjectReference Include="..\API.Core\API.Core.csproj" />
-    <ProjectReference
-      Include="..\..\Infrastructure\Infrastructure.Email\Infrastructure.Email.csproj" />
+    <ProjectReference Include="..\..\Infrastructure\Infrastructure.Email\Infrastructure.Email.csproj" />
   </ItemGroup>
 </Project>

src/Core/API/API.Specs/Mocks/MockEmailProvider.cs

@@ -0,0 +1,68 @@
+using Infrastructure.Email;
+
+namespace API.Specs.Mocks;
+
+/// <summary>
+/// Mock email provider for testing that doesn't actually send emails.
+/// Tracks sent emails for verification in tests if needed.
+/// </summary>
+public class MockEmailProvider : IEmailProvider
+{
+    public List<SentEmail> SentEmails { get; } = new();
+
+    public Task SendAsync(
+        string to,
+        string subject,
+        string body,
+        bool isHtml = true
+    )
+    {
+        SentEmails.Add(
+            new SentEmail
+            {
+                To = [to],
+                Subject = subject,
+                Body = body,
+                IsHtml = isHtml,
+                SentAt = DateTime.UtcNow,
+            }
+        );
+
+        return Task.CompletedTask;
+    }
+
+    public Task SendAsync(
+        IEnumerable<string> to,
+        string subject,
+        string body,
+        bool isHtml = true
+    )
+    {
+        SentEmails.Add(
+            new SentEmail
+            {
+                To = to.ToList(),
+                Subject = subject,
+                Body = body,
+                IsHtml = isHtml,
+                SentAt = DateTime.UtcNow,
+            }
+        );
+
+        return Task.CompletedTask;
+    }
+
+    public void Clear()
+    {
+        SentEmails.Clear();
+    }
+
+    public class SentEmail
+    {
+        public List<string> To { get; init; } = new();
+        public string Subject { get; init; } = string.Empty;
+        public string Body { get; init; } = string.Empty;
+        public bool IsHtml { get; init; }
+        public DateTime SentAt { get; init; }
+    }
+}

src/Core/API/API.Specs/Mocks/MockEmailService.cs

@@ -1,54 +1,38 @@
-using Infrastructure.Email;
+using Domain.Entities;
+using Service.Emails;
 
 namespace API.Specs.Mocks;
 
-/// <summary>
-/// Mock email service for testing that doesn't actually send emails.
-/// Tracks sent emails for verification in tests if needed.
-/// </summary>
-public class MockEmailProvider : IEmailProvider
+public class MockEmailService : IEmailService
 {
-   public List<SentEmail> SentEmails { get; } = new();
+    public List<RegistrationEmail> SentRegistrationEmails { get; } = new();
 
-   public Task SendAsync(string to, string subject, string body, bool isHtml = true)
+    public Task SendRegistrationEmailAsync(
+        UserAccount createdUser,
+        string confirmationToken
+    )
     {
-      SentEmails.Add(new SentEmail
+        SentRegistrationEmails.Add(
+            new RegistrationEmail
             {
-         To = [to],
-         Subject = subject,
-         Body = body,
-         IsHtml = isHtml,
-         SentAt = DateTime.UtcNow
-      });
-
-      return Task.CompletedTask;
+                UserAccount = createdUser,
+                ConfirmationToken = confirmationToken,
+                SentAt = DateTime.UtcNow,
             }
-
-   public Task SendAsync(IEnumerable<string> to, string subject, string body, bool isHtml = true)
-   {
-      SentEmails.Add(new SentEmail
-      {
-         To = to.ToList(),
-         Subject = subject,
-         Body = body,
-         IsHtml = isHtml,
-         SentAt = DateTime.UtcNow
-      });
+        );
 
         return Task.CompletedTask;
     }
 
     public void Clear()
     {
-      SentEmails.Clear();
+        SentRegistrationEmails.Clear();
     }
 
-   public class SentEmail
+    public class RegistrationEmail
     {
-      public List<string> To { get; init; } = new();
-      public string Subject { get; init; } = string.Empty;
-      public string Body { get; init; } = string.Empty;
-      public bool IsHtml { get; init; }
+        public UserAccount UserAccount { get; init; } = null!;
+        public string ConfirmationToken { get; init; } = string.Empty;
         public DateTime SentAt { get; init; }
     }
 }

src/Core/API/API.Specs/Steps/ApiGeneralSteps.cs

@@ -1,7 +1,7 @@
 using System.Text.Json;
-using Reqnroll;
-using FluentAssertions;
 using API.Specs;
+using FluentAssertions;
+using Reqnroll;
 
 namespace API.Specs.Steps;
 
@@ -20,7 +20,12 @@ public class ApiGeneralSteps(ScenarioContext scenario)
             return client;
         }
 
-        var factory = scenario.TryGetValue<TestApiFactory>(FactoryKey, out var f) ? f : new TestApiFactory();
+        var factory = scenario.TryGetValue<TestApiFactory>(
+            FactoryKey,
+            out var f
+        )
+            ? f
+            : new TestApiFactory();
         scenario[FactoryKey] = factory;
 
         client = factory.CreateClient();
@@ -35,13 +40,21 @@ public class ApiGeneralSteps(ScenarioContext scenario)
     }
 
     [When("I send an HTTP request {string} to {string} with body:")]
-    public async Task WhenISendAnHttpRequestStringToStringWithBody(string method, string url, string jsonBody)
+    public async Task WhenISendAnHttpRequestStringToStringWithBody(
+        string method,
+        string url,
+        string jsonBody
+    )
     {
         var client = GetClient();
 
         var requestMessage = new HttpRequestMessage(new HttpMethod(method), url)
         {
-            Content = new StringContent(jsonBody, System.Text.Encoding.UTF8, "application/json")
+            Content = new StringContent(
+                jsonBody,
+                System.Text.Encoding.UTF8,
+                "application/json"
+            ),
         };
 
         var response = await client.SendAsync(requestMessage);
@@ -52,10 +65,16 @@ public class ApiGeneralSteps(ScenarioContext scenario)
     }
 
     [When("I send an HTTP request {string} to {string}")]
-    public async Task WhenISendAnHttpRequestStringToString(string method, string url)
+    public async Task WhenISendAnHttpRequestStringToString(
+        string method,
+        string url
+    )
     {
         var client = GetClient();
-        var requestMessage = new HttpRequestMessage(new HttpMethod(method), url);
+        var requestMessage = new HttpRequestMessage(
+            new HttpMethod(method),
+            url
+        );
         var response = await client.SendAsync(requestMessage);
         var responseBody = await response.Content.ReadAsStringAsync();
 
@@ -66,34 +85,68 @@ public class ApiGeneralSteps(ScenarioContext scenario)
     [Then("the response status code should be {int}")]
     public void ThenTheResponseStatusCodeShouldBeInt(int expected)
     {
-        scenario.TryGetValue<HttpResponseMessage>(ResponseKey, out var response).Should().BeTrue();
+        scenario
+            .TryGetValue<HttpResponseMessage>(ResponseKey, out var response)
+            .Should()
+            .BeTrue();
         ((int)response!.StatusCode).Should().Be(expected);
     }
 
     [Then("the response has HTTP status {int}")]
     public void ThenTheResponseHasHttpStatusInt(int expectedCode)
     {
-        scenario.TryGetValue<HttpResponseMessage>(ResponseKey, out var response).Should().BeTrue("No response was received from the API");
+        scenario
+            .TryGetValue<HttpResponseMessage>(ResponseKey, out var response)
+            .Should()
+            .BeTrue("No response was received from the API");
         ((int)response!.StatusCode).Should().Be(expectedCode);
     }
 
     [Then("the response JSON should have {string} equal {string}")]
-    public void ThenTheResponseJsonShouldHaveStringEqualString(string field, string expected)
+    public void ThenTheResponseJsonShouldHaveStringEqualString(
+        string field,
+        string expected
+    )
     {
-        scenario.TryGetValue<HttpResponseMessage>(ResponseKey, out var response).Should().BeTrue();
-        scenario.TryGetValue<string>(ResponseBodyKey, out var responseBody).Should().BeTrue();
+        scenario
+            .TryGetValue<HttpResponseMessage>(ResponseKey, out var response)
+            .Should()
+            .BeTrue();
+        scenario
+            .TryGetValue<string>(ResponseBodyKey, out var responseBody)
+            .Should()
+            .BeTrue();
 
         using var doc = JsonDocument.Parse(responseBody!);
         var root = doc.RootElement;
 
         if (!root.TryGetProperty(field, out var value))
         {
-            root.TryGetProperty("payload", out var payloadElem).Should().BeTrue("Expected field '{0}' to be present either at the root or inside 'payload'", field);
-            payloadElem.ValueKind.Should().Be(JsonValueKind.Object, "payload must be an object");
-            payloadElem.TryGetProperty(field, out value).Should().BeTrue("Expected field '{0}' to be present inside 'payload'", field);
+            root.TryGetProperty("payload", out var payloadElem)
+                .Should()
+                .BeTrue(
+                    "Expected field '{0}' to be present either at the root or inside 'payload'",
+                    field
+                );
+            payloadElem
+                .ValueKind.Should()
+                .Be(JsonValueKind.Object, "payload must be an object");
+            payloadElem
+                .TryGetProperty(field, out value)
+                .Should()
+                .BeTrue(
+                    "Expected field '{0}' to be present inside 'payload'",
+                    field
+                );
         }
 
-        value.ValueKind.Should().Be(JsonValueKind.String, "Expected field '{0}' to be a string", field);
+        value
+            .ValueKind.Should()
+            .Be(
+                JsonValueKind.String,
+                "Expected field '{0}' to be a string",
+                field
+            );
         value.GetString().Should().Be(expected);
     }
 }

src/Core/API/API.Specs/Steps/AuthSteps.cs

@@ -1,7 +1,7 @@
 using System.Text.Json;
-using Reqnroll;
-using FluentAssertions;
 using API.Specs;
+using FluentAssertions;
+using Reqnroll;
 
 namespace API.Specs.Steps;
 
@@ -21,7 +21,12 @@ public class AuthSteps(ScenarioContext scenario)
             return client;
         }
 
-        var factory = scenario.TryGetValue<TestApiFactory>(FactoryKey, out var f) ? f : new TestApiFactory();
+        var factory = scenario.TryGetValue<TestApiFactory>(
+            FactoryKey,
+            out var f
+        )
+            ? f
+            : new TestApiFactory();
         scenario[FactoryKey] = factory;
 
         client = factory.CreateClient();
@@ -45,15 +50,25 @@ public class AuthSteps(ScenarioContext scenario)
     public async Task WhenISubmitALoginRequestWithAUsernameAndPassword()
     {
         var client = GetClient();
-        var (username, password) = scenario.TryGetValue<(string username, string password)>(TestUserKey, out var user)
+        var (username, password) = scenario.TryGetValue<(
+            string username,
+            string password
+        )>(TestUserKey, out var user)
             ? user
             : ("test.user", "password");
 
         var body = JsonSerializer.Serialize(new { username, password });
 
-        var requestMessage = new HttpRequestMessage(HttpMethod.Post, "/api/auth/login")
+        var requestMessage = new HttpRequestMessage(
+            HttpMethod.Post,
+            "/api/auth/login"
+        )
         {
-            Content = new StringContent(body, System.Text.Encoding.UTF8, "application/json")
+            Content = new StringContent(
+                body,
+                System.Text.Encoding.UTF8,
+                "application/json"
+            ),
         };
 
         var response = await client.SendAsync(requestMessage);
@@ -69,9 +84,16 @@ public class AuthSteps(ScenarioContext scenario)
         var client = GetClient();
         var body = JsonSerializer.Serialize(new { password = "test" });
 
-        var requestMessage = new HttpRequestMessage(HttpMethod.Post, "/api/auth/login")
+        var requestMessage = new HttpRequestMessage(
+            HttpMethod.Post,
+            "/api/auth/login"
+        )
         {
-            Content = new StringContent(body, System.Text.Encoding.UTF8, "application/json")
+            Content = new StringContent(
+                body,
+                System.Text.Encoding.UTF8,
+                "application/json"
+            ),
         };
 
         var response = await client.SendAsync(requestMessage);
@@ -87,9 +109,16 @@ public class AuthSteps(ScenarioContext scenario)
         var client = GetClient();
         var body = JsonSerializer.Serialize(new { username = "test" });
 
-        var requestMessage = new HttpRequestMessage(HttpMethod.Post, "/api/auth/login")
+        var requestMessage = new HttpRequestMessage(
+            HttpMethod.Post,
+            "/api/auth/login"
+        )
         {
-            Content = new StringContent(body, System.Text.Encoding.UTF8, "application/json")
+            Content = new StringContent(
+                body,
+                System.Text.Encoding.UTF8,
+                "application/json"
+            ),
         };
 
         var response = await client.SendAsync(requestMessage);
@@ -103,9 +132,16 @@ public class AuthSteps(ScenarioContext scenario)
     public async Task WhenISubmitALoginRequestWithBothUsernameAndPasswordMissing()
     {
         var client = GetClient();
-        var requestMessage = new HttpRequestMessage(HttpMethod.Post, "/api/auth/login")
+        var requestMessage = new HttpRequestMessage(
+            HttpMethod.Post,
+            "/api/auth/login"
+        )
         {
-            Content = new StringContent("{}", System.Text.Encoding.UTF8, "application/json")
+            Content = new StringContent(
+                "{}",
+                System.Text.Encoding.UTF8,
+                "application/json"
+            ),
         };
 
         var response = await client.SendAsync(requestMessage);
@@ -118,37 +154,55 @@ public class AuthSteps(ScenarioContext scenario)
     [Then("the response JSON should have an access token")]
     public void ThenTheResponseJsonShouldHaveAnAccessToken()
     {
-        scenario.TryGetValue<HttpResponseMessage>(ResponseKey, out var response).Should().BeTrue();
-        scenario.TryGetValue<string>(ResponseBodyKey, out var responseBody).Should().BeTrue();
+        scenario
+            .TryGetValue<HttpResponseMessage>(ResponseKey, out var response)
+            .Should()
+            .BeTrue();
+        scenario
+            .TryGetValue<string>(ResponseBodyKey, out var responseBody)
+            .Should()
+            .BeTrue();
 
         var doc = JsonDocument.Parse(responseBody!);
         var root = doc.RootElement;
         JsonElement tokenElem = default;
         var hasToken = false;
 
-
-        if (root.TryGetProperty("payload", out var payloadElem) && payloadElem.ValueKind == JsonValueKind.Object)
+        if (
+            root.TryGetProperty("payload", out var payloadElem)
+            && payloadElem.ValueKind == JsonValueKind.Object
+        )
         {
-            hasToken = payloadElem.TryGetProperty("accessToken", out tokenElem)
+            hasToken =
+                payloadElem.TryGetProperty("accessToken", out tokenElem)
                 || payloadElem.TryGetProperty("AccessToken", out tokenElem);
         }
 
-
-        hasToken.Should().BeTrue("Expected an access token either at the root or inside 'payload'");
+        hasToken
+            .Should()
+            .BeTrue(
+                "Expected an access token either at the root or inside 'payload'"
+            );
 
         var token = tokenElem.GetString();
         token.Should().NotBeNullOrEmpty();
     }
 
-
     [When("I submit a login request using a GET request")]
     public async Task WhenISubmitALoginRequestUsingAgetRequest()
     {
         var client = GetClient();
         // testing GET
-        var requestMessage = new HttpRequestMessage(HttpMethod.Get, "/api/auth/login")
+        var requestMessage = new HttpRequestMessage(
+            HttpMethod.Get,
+            "/api/auth/login"
+        )
         {
-            Content = new StringContent("{}", System.Text.Encoding.UTF8, "application/json")
+            Content = new StringContent(
+                "{}",
+                System.Text.Encoding.UTF8,
+                "application/json"
+            ),
         };
 
         var response = await client.SendAsync(requestMessage);
@@ -184,14 +238,21 @@ public class AuthSteps(ScenarioContext scenario)
             lastName,
             email,
             dateOfBirth,
-            password
+            password,
         };
 
         var body = JsonSerializer.Serialize(registrationData);
 
-        var requestMessage = new HttpRequestMessage(HttpMethod.Post, "/api/auth/register")
+        var requestMessage = new HttpRequestMessage(
+            HttpMethod.Post,
+            "/api/auth/register"
+        )
         {
-            Content = new StringContent(body, System.Text.Encoding.UTF8, "application/json")
+            Content = new StringContent(
+                body,
+                System.Text.Encoding.UTF8,
+                "application/json"
+            ),
         };
 
         var response = await client.SendAsync(requestMessage);
@@ -205,9 +266,16 @@ public class AuthSteps(ScenarioContext scenario)
     public async Task WhenISubmitARegistrationRequestUsingAGetRequest()
     {
         var client = GetClient();
-        var requestMessage = new HttpRequestMessage(HttpMethod.Get, "/api/auth/register")
+        var requestMessage = new HttpRequestMessage(
+            HttpMethod.Get,
+            "/api/auth/register"
+        )
         {
-            Content = new StringContent("{}", System.Text.Encoding.UTF8, "application/json")
+            Content = new StringContent(
+                "{}",
+                System.Text.Encoding.UTF8,
+                "application/json"
+            ),
         };
 
         var response = await client.SendAsync(requestMessage);

src/Core/API/API.Specs/TestApiFactory.cs

@@ -5,6 +5,7 @@ using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Mvc.Testing;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
+using Service.Emails;
 
 namespace API.Specs
 {
@@ -16,16 +17,29 @@ namespace API.Specs
 
             builder.ConfigureServices(services =>
             {
-                // Replace the real email service with mock for testing
-                var descriptor = services.SingleOrDefault(
-                    d => d.ServiceType == typeof(IEmailProvider));
+                // Replace the real email provider with mock for testing
+                var emailProviderDescriptor = services.SingleOrDefault(d =>
+                    d.ServiceType == typeof(IEmailProvider)
+                );
 
-                if (descriptor != null)
+                if (emailProviderDescriptor != null)
                 {
-                    services.Remove(descriptor);
+                    services.Remove(emailProviderDescriptor);
                 }
 
                 services.AddScoped<IEmailProvider, MockEmailProvider>();
+
+                // Replace the real email service with mock for testing
+                var emailServiceDescriptor = services.SingleOrDefault(d =>
+                    d.ServiceType == typeof(IEmailService)
+                );
+
+                if (emailServiceDescriptor != null)
+                {
+                    services.Remove(emailServiceDescriptor);
+                }
+
+                services.AddScoped<IEmailService, MockEmailService>();
             });
         }
     }

src/Core/Core.slnx

@@ -21,6 +21,7 @@
     </Folder>
     <Folder Name="/Service/">
         <Project Path="Service/Service.Auth.Tests/Service.Auth.Tests.csproj" />
+        <Project Path="Service/Service.Emails/Service.Emails.csproj" />
         <Project Path="Service/Service.UserManagement/Service.UserManagement.csproj" />
         <Project Path="Service\Service.Auth\Service.Auth.csproj" />
     </Folder>

src/Core/Service/Service.Auth.Tests/Dockerfile

@@ -0,0 +1,21 @@
+FROM mcr.microsoft.com/dotnet/sdk:10.0 AS build
+ARG BUILD_CONFIGURATION=Release
+WORKDIR /src
+COPY ["Domain.Entities/Domain.Entities.csproj", "Domain.Entities/"]
+COPY ["Domain.Exceptions/Domain.Exceptions.csproj", "Domain.Exceptions/"]
+COPY ["Infrastructure/Infrastructure.Email/Infrastructure.Email.csproj", "Infrastructure/Infrastructure.Email/"]
+COPY ["Infrastructure/Infrastructure.Email.Templates/Infrastructure.Email.Templates.csproj", "Infrastructure/Infrastructure.Email.Templates/"]
+COPY ["Infrastructure/Infrastructure.Jwt/Infrastructure.Jwt.csproj", "Infrastructure/Infrastructure.Jwt/"]
+COPY ["Infrastructure/Infrastructure.Repository/Infrastructure.Repository.csproj", "Infrastructure/Infrastructure.Repository/"]
+COPY ["Infrastructure/Infrastructure.PasswordHashing/Infrastructure.PasswordHashing.csproj", "Infrastructure/Infrastructure.PasswordHashing/"]
+COPY ["Service/Service.Auth/Service.Auth.csproj", "Service/Service.Auth/"]
+COPY ["Service/Service.Auth.Tests/Service.Auth.Tests.csproj", "Service/Service.Auth.Tests/"]
+RUN dotnet restore "Service/Service.Auth.Tests/Service.Auth.Tests.csproj"
+COPY . .
+WORKDIR "/src/Service/Service.Auth.Tests"
+RUN dotnet build "./Service.Auth.Tests.csproj" -c $BUILD_CONFIGURATION -o /app/build
+
+FROM build AS final
+RUN mkdir -p /app/test-results/service-auth-tests
+WORKDIR /src/Service/Service.Auth.Tests
+ENTRYPOINT ["dotnet", "test", "./Service.Auth.Tests.csproj", "-c", "Release", "--logger", "trx;LogFileName=/app/test-results/service-auth-tests/results.trx"]

src/Core/Service/Service.Auth.Tests/LoginService.test.cs

@@ -11,15 +11,18 @@ public class LoginServiceTest
 {
     private readonly Mock<IAuthRepository> _authRepoMock;
     private readonly Mock<IPasswordInfrastructure> _passwordInfraMock;
+    private readonly Mock<ITokenService> _tokenServiceMock;
     private readonly LoginService _loginService;
 
     public LoginServiceTest()
     {
         _authRepoMock = new Mock<IAuthRepository>();
         _passwordInfraMock = new Mock<IPasswordInfrastructure>();
+        _tokenServiceMock = new Mock<ITokenService>();
         _loginService = new LoginService(
             _authRepoMock.Object,
-            _passwordInfraMock.Object
+            _passwordInfraMock.Object,
+            _tokenServiceMock.Object
         );
     }
 
@@ -63,13 +66,26 @@ public class LoginServiceTest
             .Setup(x => x.Verify(It.IsAny<string>(), It.IsAny<string>()))
             .Returns(true);
 
+        _tokenServiceMock
+            .Setup(x => x.GenerateAccessToken(It.IsAny<UserAccount>()))
+            .Returns("access-token");
+
+        _tokenServiceMock
+            .Setup(x => x.GenerateRefreshToken(It.IsAny<UserAccount>()))
+            .Returns("refresh-token");
+
         // Act
-        var result = await _loginService.LoginAsync(username, It.IsAny<string>());
+        var result = await _loginService.LoginAsync(
+            username,
+            It.IsAny<string>()
+        );
 
         // Assert
         result.Should().NotBeNull();
-        result.UserAccountId.Should().Be(userAccountId);
-        result.Username.Should().Be(username);
+        result.UserAccount.UserAccountId.Should().Be(userAccountId);
+        result.UserAccount.Username.Should().Be(username);
+        result.AccessToken.Should().Be("access-token");
+        result.RefreshToken.Should().Be("refresh-token");
 
         _authRepoMock.Verify(
             x => x.GetActiveCredentialByUserAccountIdAsync(userAccountId),

src/Core/Service/Service.Auth.Tests/RegisterService.test.cs

@@ -1,11 +1,10 @@
 using Domain.Entities;
 using Domain.Exceptions;
 using FluentAssertions;
-using Infrastructure.Email;
-using Infrastructure.Email.Templates.Rendering;
 using Infrastructure.PasswordHashing;
 using Infrastructure.Repository.Auth;
 using Moq;
+using Service.Emails;
 
 namespace Service.Auth.Tests;
 
@@ -13,27 +12,27 @@ public class RegisterServiceTest
 {
     private readonly Mock<IAuthRepository> _authRepoMock;
     private readonly Mock<IPasswordInfrastructure> _passwordInfraMock;
-    private readonly Mock<IEmailProvider> _emailProviderMock;
-    private readonly Mock<IEmailTemplateProvider> _emailTemplateProviderMock;
+    private readonly Mock<ITokenService> _tokenServiceMock;
+    private readonly Mock<IEmailService> _emailServiceMock; // todo handle email related test cases here
     private readonly RegisterService _registerService;
 
     public RegisterServiceTest()
     {
         _authRepoMock = new Mock<IAuthRepository>();
         _passwordInfraMock = new Mock<IPasswordInfrastructure>();
-        _emailProviderMock = new Mock<IEmailProvider>();
-        _emailTemplateProviderMock = new Mock<IEmailTemplateProvider>();
+        _tokenServiceMock = new Mock<ITokenService>();
+        _emailServiceMock = new Mock<IEmailService>();
 
         _registerService = new RegisterService(
             _authRepoMock.Object,
             _passwordInfraMock.Object,
-            _emailProviderMock.Object,
-            _emailTemplateProviderMock.Object
+            _tokenServiceMock.Object,
+            _emailServiceMock.Object
         );
     }
 
     [Fact]
-    public async Task RegisterAsync_WithValidData_CreatesUserAndSendsEmail()
+    public async Task RegisterAsync_WithValidData_CreatesUserAndReturnsAuthServiceReturn()
     {
         // Arrange
         var userAccount = new UserAccount
@@ -48,7 +47,6 @@ public class RegisterServiceTest
         const string password = "SecurePassword123!";
         const string hashedPassword = "hashed_password_value";
         var expectedUserId = Guid.NewGuid();
-        const string expectedEmailHtml = "<html><body>Welcome!</body></html>";
 
         // Mock: No existing user
         _authRepoMock
@@ -89,36 +87,28 @@ public class RegisterServiceTest
                 }
             );
 
-        // Mock: Email template rendering
-        _emailTemplateProviderMock
-            .Setup(x =>
-                x.RenderUserRegisteredEmailAsync(
-                    userAccount.FirstName,
-                    It.IsAny<string>()
-                )
-            )
-            .ReturnsAsync(expectedEmailHtml);
+        // Mock: Token generation
+        _tokenServiceMock
+            .Setup(x => x.GenerateAccessToken(It.IsAny<UserAccount>()))
+            .Returns("access-token");
 
-        // Mock: Email sending
-        _emailProviderMock
-            .Setup(x =>
-                x.SendAsync(
-                    userAccount.Email,
-                    "Welcome to The Biergarten App!",
-                    expectedEmailHtml,
-                    true
-                )
-            )
-            .Returns(Task.CompletedTask);
+        _tokenServiceMock
+            .Setup(x => x.GenerateRefreshToken(It.IsAny<UserAccount>()))
+            .Returns("refresh-token");
 
         // Act
-        var result = await _registerService.RegisterAsync(userAccount, password);
+        var result = await _registerService.RegisterAsync(
+            userAccount,
+            password
+        );
 
         // Assert
         result.Should().NotBeNull();
-        result.UserAccountId.Should().Be(expectedUserId);
-        result.Username.Should().Be(userAccount.Username);
-        result.Email.Should().Be(userAccount.Email);
+        result.UserAccount.UserAccountId.Should().Be(expectedUserId);
+        result.UserAccount.Username.Should().Be(userAccount.Username);
+        result.UserAccount.Email.Should().Be(userAccount.Email);
+        result.AccessToken.Should().Be("access-token");
+        result.RefreshToken.Should().Be("refresh-token");
 
         // Verify all mocks were called as expected
         _authRepoMock.Verify(
@@ -142,24 +132,14 @@ public class RegisterServiceTest
                 ),
             Times.Once
         );
-        _emailTemplateProviderMock.Verify(
+        _emailServiceMock.Verify(
             x =>
-                x.RenderUserRegisteredEmailAsync(
-                    userAccount.FirstName,
+                x.SendRegistrationEmailAsync(
+                    It.IsAny<UserAccount>(),
                     It.IsAny<string>()
                 ),
             Times.Once
         );
-        _emailProviderMock.Verify(
-            x =>
-                x.SendAsync(
-                    userAccount.Email,
-                    "Welcome to The Biergarten App!",
-                    expectedEmailHtml,
-                    true
-                ),
-            Times.Once
-        );
     }
 
     [Fact]
@@ -195,7 +175,8 @@ public class RegisterServiceTest
             .ReturnsAsync((UserAccount?)null);
 
         // Act
-        var act = async () => await _registerService.RegisterAsync(userAccount, password);
+        var act = async () =>
+            await _registerService.RegisterAsync(userAccount, password);
 
         // Assert
         await act.Should()
@@ -215,18 +196,6 @@ public class RegisterServiceTest
                 ),
             Times.Never
         );
-
-        // Verify email was never sent
-        _emailProviderMock.Verify(
-            x =>
-                x.SendAsync(
-                    It.IsAny<string>(),
-                    It.IsAny<string>(),
-                    It.IsAny<string>(),
-                    It.IsAny<bool>()
-                ),
-            Times.Never
-        );
     }
 
     [Fact]
@@ -262,7 +231,8 @@ public class RegisterServiceTest
             .ReturnsAsync(existingUser);
 
         // Act
-        var act = async () => await _registerService.RegisterAsync(userAccount, password);
+        var act = async () =>
+            await _registerService.RegisterAsync(userAccount, password);
 
         // Assert
         await act.Should()
@@ -323,14 +293,13 @@ public class RegisterServiceTest
             )
             .ReturnsAsync(new UserAccount { UserAccountId = Guid.NewGuid() });
 
-        _emailTemplateProviderMock
-            .Setup(x =>
-                x.RenderUserRegisteredEmailAsync(
-                    It.IsAny<string>(),
-                    It.IsAny<string>()
-                )
-            )
-            .ReturnsAsync("<html></html>");
+        _tokenServiceMock
+            .Setup(x => x.GenerateAccessToken(It.IsAny<UserAccount>()))
+            .Returns("access-token");
+
+        _tokenServiceMock
+            .Setup(x => x.GenerateRefreshToken(It.IsAny<UserAccount>()))
+            .Returns("refresh-token");
 
         // Act
         await _registerService.RegisterAsync(userAccount, plainPassword);
@@ -350,152 +319,4 @@ public class RegisterServiceTest
             Times.Once
         );
     }
-
-    [Fact]
-    public async Task RegisterAsync_EmailConfirmationLink_ContainsUserEmail()
-    {
-        // Arrange
-        var userAccount = new UserAccount
-        {
-            Username = "testuser",
-            FirstName = "Test",
-            LastName = "User",
-            Email = "test@example.com",
-            DateOfBirth = new DateTime(1990, 1, 1),
-        };
-        var password = "Password123!";
-        string? capturedConfirmationLink = null;
-
-        _authRepoMock
-            .Setup(x => x.GetUserByUsernameAsync(It.IsAny<string>()))
-            .ReturnsAsync((UserAccount?)null);
-
-        _authRepoMock
-            .Setup(x => x.GetUserByEmailAsync(It.IsAny<string>()))
-            .ReturnsAsync((UserAccount?)null);
-
-        _passwordInfraMock
-            .Setup(x => x.Hash(It.IsAny<string>()))
-            .Returns("hashed");
-
-        _authRepoMock
-            .Setup(x =>
-                x.RegisterUserAsync(
-                    It.IsAny<string>(),
-                    It.IsAny<string>(),
-                    It.IsAny<string>(),
-                    It.IsAny<string>(),
-                    It.IsAny<DateTime>(),
-                    It.IsAny<string>()
-                )
-            )
-            .ReturnsAsync(
-                new UserAccount
-                {
-                    UserAccountId = Guid.NewGuid(),
-                    Username = userAccount.Username,
-                    FirstName = userAccount.FirstName,
-                    LastName = userAccount.LastName,
-                    Email = userAccount.Email,
-                    DateOfBirth = userAccount.DateOfBirth,
-                }
-            );
-
-        _emailTemplateProviderMock
-            .Setup(x =>
-                x.RenderUserRegisteredEmailAsync(
-                    It.IsAny<string>(),
-                    It.IsAny<string>()
-                )
-            )
-            .Callback<string, string>(
-                (_, link) => capturedConfirmationLink = link
-            )
-            .ReturnsAsync("<html></html>");
-
-        // Act
-        await _registerService.RegisterAsync(userAccount, password);
-
-        // Assert
-        capturedConfirmationLink.Should().NotBeNull();
-        capturedConfirmationLink
-            .Should()
-            .Contain(Uri.EscapeDataString(userAccount.Email));
-    }
-
-    [Fact]
-    public async Task RegisterAsync_WhenEmailSendingFails_ExceptionPropagates()
-    {
-        // Arrange
-        var userAccount = new UserAccount
-        {
-            Username = "testuser",
-            FirstName = "Test",
-            LastName = "User",
-            Email = "test@example.com",
-            DateOfBirth = new DateTime(1990, 1, 1),
-        };
-        var password = "Password123!";
-
-        _authRepoMock
-            .Setup(x => x.GetUserByUsernameAsync(It.IsAny<string>()))
-            .ReturnsAsync((UserAccount?)null);
-
-        _authRepoMock
-            .Setup(x => x.GetUserByEmailAsync(It.IsAny<string>()))
-            .ReturnsAsync((UserAccount?)null);
-
-        _passwordInfraMock
-            .Setup(x => x.Hash(It.IsAny<string>()))
-            .Returns("hashed");
-
-        _authRepoMock
-            .Setup(x =>
-                x.RegisterUserAsync(
-                    It.IsAny<string>(),
-                    It.IsAny<string>(),
-                    It.IsAny<string>(),
-                    It.IsAny<string>(),
-                    It.IsAny<DateTime>(),
-                    It.IsAny<string>()
-                )
-            )
-            .ReturnsAsync(
-                new UserAccount
-                {
-                    UserAccountId = Guid.NewGuid(),
-                    Email = userAccount.Email,
-                }
-            );
-
-        _emailTemplateProviderMock
-            .Setup(x =>
-                x.RenderUserRegisteredEmailAsync(
-                    It.IsAny<string>(),
-                    It.IsAny<string>()
-                )
-            )
-            .ReturnsAsync("<html></html>");
-
-        _emailProviderMock
-            .Setup(x =>
-                x.SendAsync(
-                    It.IsAny<string>(),
-                    It.IsAny<string>(),
-                    It.IsAny<string>(),
-                    It.IsAny<bool>()
-                )
-            )
-            .ThrowsAsync(
-                new InvalidOperationException("SMTP server unavailable")
-            );
-
-        // Act
-        var act = async () => await _registerService.RegisterAsync(userAccount, password);
-
-        // Assert
-        await act.Should()
-            .ThrowAsync<InvalidOperationException>()
-            .WithMessage("SMTP server unavailable");
-    }
 }

src/Core/Service/Service.Auth/ILoginService.cs

@@ -4,5 +4,5 @@ namespace Service.Auth;
 
 public interface ILoginService
 {
-    Task<UserAccount> LoginAsync(string username, string password);
+    Task<LoginServiceReturn> LoginAsync(string username, string password);
 }

src/Core/Service/Service.Auth/IRegisterService.cs

@@ -2,7 +2,38 @@ using Domain.Entities;
 
 namespace Service.Auth;
 
+public record RegisterServiceReturn
+{
+    public bool IsAuthenticated { get; init; } = false;
+    public bool EmailSent { get; init; } = false;
+    public UserAccount UserAccount { get; init; }
+    public string AccessToken { get; init; } = string.Empty;
+    public string RefreshToken { get; init; } = string.Empty;
+
+    public RegisterServiceReturn(
+        UserAccount userAccount,
+        string accessToken,
+        string refreshToken,
+        bool emailSent
+    )
+    {
+        IsAuthenticated = true;
+        EmailSent = emailSent;
+        UserAccount = userAccount;
+        AccessToken = accessToken;
+        RefreshToken = refreshToken;
+    }
+
+    public RegisterServiceReturn(UserAccount userAccount)
+    {
+        UserAccount = userAccount;
+    }
+}
+
 public interface IRegisterService
 {
-    Task<UserAccount> RegisterAsync(UserAccount userAccount, string password);
+    Task<RegisterServiceReturn> RegisterAsync(
+        UserAccount userAccount,
+        string password
+    );
 }

src/Core/Service/Service.Auth/ITokenService.cs

@@ -0,0 +1,34 @@
+using Domain.Entities;
+using Infrastructure.Jwt;
+
+namespace Service.Auth;
+
+public interface ITokenService
+{
+    public string GenerateAccessToken(UserAccount user);
+    public string GenerateRefreshToken(UserAccount user);
+}
+
+public class TokenService(ITokenInfrastructure tokenInfrastructure)
+    : ITokenService
+{
+    public string GenerateAccessToken(UserAccount userAccount)
+    {
+        var jwtExpiresAt = DateTime.UtcNow.AddHours(1);
+        return tokenInfrastructure.GenerateJwt(
+            userAccount.UserAccountId,
+            userAccount.Username,
+            jwtExpiresAt
+        );
+    }
+
+    public string GenerateRefreshToken(UserAccount userAccount)
+    {
+        var jwtExpiresAt = DateTime.UtcNow.AddDays(21);
+        return tokenInfrastructure.GenerateJwt(
+            userAccount.UserAccountId,
+            userAccount.Username,
+            jwtExpiresAt
+        );
+    }
+}

src/Core/Service/Service.Auth/LoginService.cs

@@ -5,30 +5,42 @@ using Infrastructure.Repository.Auth;
 
 namespace Service.Auth;
 
+public record LoginServiceReturn(
+    UserAccount UserAccount,
+    string RefreshToken,
+    string AccessToken
+);
+
 public class LoginService(
     IAuthRepository authRepo,
-    IPasswordInfrastructure passwordInfrastructure
+    IPasswordInfrastructure passwordInfrastructure,
+    ITokenService tokenService
 ) : ILoginService
 {
-
-    public async Task<UserAccount> LoginAsync(string username, string password)
+    public async Task<LoginServiceReturn> LoginAsync(
+        string username,
+        string password
+    )
     {
         // Attempt lookup by username
-        var user = await authRepo.GetUserByUsernameAsync(username);
-
         // the user was not found
-        if (user is null)
-            throw new UnauthorizedException("Invalid username or password.");
+        var user =
+            await authRepo.GetUserByUsernameAsync(username)
+            ?? throw new UnauthorizedException("Invalid username or password.");
 
         // @todo handle expired passwords
-        var activeCred = await authRepo.GetActiveCredentialByUserAccountIdAsync(user.UserAccountId);
-
-        if (activeCred is null)
-            throw new UnauthorizedException("Invalid username or password.");
+        var activeCred =
+            await authRepo.GetActiveCredentialByUserAccountIdAsync(
+                user.UserAccountId
+            )
+            ?? throw new UnauthorizedException("Invalid username or password.");
 
         if (!passwordInfrastructure.Verify(password, activeCred.Hash))
             throw new UnauthorizedException("Invalid username or password.");
 
-        return user;
+        string accessToken = tokenService.GenerateAccessToken(user);
+        string refreshToken = tokenService.GenerateRefreshToken(user);
+
+        return new LoginServiceReturn(user, refreshToken, accessToken);
     }
 }

src/Core/Service/Service.Auth/RegisterService.cs

@@ -4,28 +4,40 @@ using Infrastructure.Email;
 using Infrastructure.Email.Templates.Rendering;
 using Infrastructure.PasswordHashing;
 using Infrastructure.Repository.Auth;
+using Microsoft.Extensions.Logging;
+using Service.Emails;
 
 namespace Service.Auth;
 
 public class RegisterService(
     IAuthRepository authRepo,
     IPasswordInfrastructure passwordInfrastructure,
-    IEmailProvider emailProvider,
-    IEmailTemplateProvider emailTemplateProvider
+    ITokenService tokenService,
+    IEmailService emailService
 ) : IRegisterService
 {
-    public async Task<UserAccount> RegisterAsync(UserAccount userAccount, string password)
+    private async Task ValidateUserDoesNotExist(UserAccount userAccount)
     {
         // Check if user already exists
-        var existingUsername = await authRepo.GetUserByUsernameAsync(userAccount.Username);
-        var existingEmail = await authRepo.GetUserByEmailAsync(userAccount.Email);
+        var existingUsername = await authRepo.GetUserByUsernameAsync(
+            userAccount.Username
+        );
+        var existingEmail = await authRepo.GetUserByEmailAsync(
+            userAccount.Email
+        );
 
         if (existingUsername != null || existingEmail != null)
         {
             throw new ConflictException("Username or email already exists");
         }
+    }
 
-
+    public async Task<RegisterServiceReturn> RegisterAsync(
+        UserAccount userAccount,
+        string password
+    )
+    {
+        await ValidateUserDoesNotExist(userAccount);
         // password hashing
         var hashed = passwordInfrastructure.Hash(password);
 
@@ -36,26 +48,41 @@ public class RegisterService(
             userAccount.LastName,
             userAccount.Email,
             userAccount.DateOfBirth,
-            hashed);
-
-
-        // Generate confirmation link (TODO: implement proper token-based confirmation)
-        var confirmationLink = $"https://thebiergarten.app/confirm?email={Uri.EscapeDataString(createdUser.Email)}";
-
-        // Render email template
-        var emailHtml = await emailTemplateProvider.RenderUserRegisteredEmailAsync(
-            createdUser.FirstName,
-            confirmationLink
+            hashed
         );
 
-        // Send welcome email with rendered template
-        await emailProvider.SendAsync(
-            createdUser.Email,
-            "Welcome to The Biergarten App!",
-            emailHtml,
-            isHtml: true
+        var accessToken = tokenService.GenerateAccessToken(createdUser);
+        var refreshToken = tokenService.GenerateRefreshToken(createdUser);
+
+        if (
+            string.IsNullOrEmpty(accessToken)
+            || string.IsNullOrEmpty(refreshToken)
+        )
+        {
+            return new RegisterServiceReturn(createdUser);
+        }
+
+        bool emailSent = false;
+        try
+        {
+            // send confirmation email
+            await emailService.SendRegistrationEmailAsync(
+                createdUser,
+                "some-confirmation-token"
             );
 
-        return createdUser;
+            emailSent = true;
+        }
+        catch
+        {
+            // ignored
+        }
+
+        return new RegisterServiceReturn(
+            createdUser,
+            accessToken,
+            refreshToken,
+            emailSent
+        );
     }
 }

src/Core/Service/Service.Auth/Service.Auth.csproj

@@ -5,20 +5,14 @@
     <Nullable>enable</Nullable>
   </PropertyGroup>
 
-  <ItemGroup>
-    <PackageReference Include="Konscious.Security.Cryptography.Argon2" Version="1.3.1" />
-  </ItemGroup>
-
   <ItemGroup>
     <ProjectReference Include="..\..\Domain.Entities\Domain.Entities.csproj" />
     <ProjectReference Include="..\..\Domain.Exceptions\Domain.Exceptions.csproj" />
-    <ProjectReference
-      Include="..\..\Infrastructure\Infrastructure.Email\Infrastructure.Email.csproj" />
-    <ProjectReference
-      Include="..\..\Infrastructure\Infrastructure.Email.Templates\Infrastructure.Email.Templates.csproj" />
-    <ProjectReference
-      Include="..\..\Infrastructure\Infrastructure.Repository\Infrastructure.Repository.csproj" />
-    <ProjectReference
-      Include="..\..\Infrastructure\Infrastructure.PasswordHashing\Infrastructure.PasswordHashing.csproj" />
+    <ProjectReference Include="..\..\Infrastructure\Infrastructure.Email\Infrastructure.Email.csproj" />
+    <ProjectReference Include="..\..\Infrastructure\Infrastructure.Email.Templates\Infrastructure.Email.Templates.csproj" />
+    <ProjectReference Include="..\..\Infrastructure\Infrastructure.Jwt\Infrastructure.Jwt.csproj" />
+    <ProjectReference Include="..\..\Infrastructure\Infrastructure.Repository\Infrastructure.Repository.csproj" />
+    <ProjectReference Include="..\..\Infrastructure\Infrastructure.PasswordHashing\Infrastructure.PasswordHashing.csproj" />
+    <ProjectReference Include="..\Service.Emails\Service.Emails.csproj" />
   </ItemGroup>
 </Project>

src/Core/Service/Service.Emails/EmailService.cs

@@ -0,0 +1,41 @@
+using Domain.Entities;
+using Infrastructure.Email;
+using Infrastructure.Email.Templates.Rendering;
+
+namespace Service.Emails;
+
+public interface IEmailService
+{
+    public Task SendRegistrationEmailAsync(
+        UserAccount createdUser,
+        string confirmationToken
+    );
+}
+
+public class EmailService(
+    IEmailProvider emailProvider,
+    IEmailTemplateProvider emailTemplateProvider
+) : IEmailService
+{
+    public async Task SendRegistrationEmailAsync(
+        UserAccount createdUser,
+        string confirmationToken
+    )
+    {
+        var confirmationLink =
+            $"https://thebiergarten.app/confirm?token={confirmationToken}";
+
+        var emailHtml =
+            await emailTemplateProvider.RenderUserRegisteredEmailAsync(
+                createdUser.FirstName,
+                confirmationLink
+            );
+
+        await emailProvider.SendAsync(
+            createdUser.Email,
+            "Welcome to The Biergarten App!",
+            emailHtml,
+            isHtml: true
+        );
+    }
+}

src/Core/Service/Service.Emails/Service.Emails.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net10.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\..\Domain.Entities\Domain.Entities.csproj" />
+    <ProjectReference Include="..\..\Infrastructure\Infrastructure.Email.Templates\Infrastructure.Email.Templates.csproj" />
+    <ProjectReference Include="..\..\Infrastructure\Infrastructure.Email\Infrastructure.Email.csproj" />
+  </ItemGroup>
+</Project>

src/Core/Service/Service.UserManagement/Service.UserManagement.csproj

@@ -1,5 +1,4 @@
 <Project Sdk="Microsoft.NET.Sdk">
-
   <PropertyGroup>
     <TargetFramework>net10.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
@@ -8,8 +7,6 @@
 
   <ItemGroup>
     <ProjectReference Include="..\..\Domain.Exceptions\Domain.Exceptions.csproj" />
-        <ProjectReference
-            Include="..\..\Infrastructure\Infrastructure.Repository\Infrastructure.Repository.csproj" />
+    <ProjectReference Include="..\..\Infrastructure\Infrastructure.Repository\Infrastructure.Repository.csproj" />
   </ItemGroup>
-
 </Project>

src/Core/Service/Service.UserManagement/User/IUserService.cs

@@ -4,7 +4,10 @@ namespace Service.UserManagement.User;
 
 public interface IUserService
 {
-    Task<IEnumerable<UserAccount>> GetAllAsync(int? limit = null, int? offset = null);
+    Task<IEnumerable<UserAccount>> GetAllAsync(
+        int? limit = null,
+        int? offset = null
+    );
     Task<UserAccount> GetByIdAsync(Guid id);
 
     Task UpdateAsync(UserAccount userAccount);

src/Core/Service/Service.UserManagement/User/UserService.cs

@@ -6,7 +6,10 @@ namespace Service.UserManagement.User;
 
 public class UserService(IUserAccountRepository repository) : IUserService
 {
-    public async Task<IEnumerable<UserAccount>> GetAllAsync(int? limit = null, int? offset = null)
+    public async Task<IEnumerable<UserAccount>> GetAllAsync(
+        int? limit = null,
+        int? offset = null
+    )
     {
         return await repository.GetAllAsync(limit, offset);
     }