Move Infrastructure.Jwt into Features.Users (#287)

web/backend/Features/Features.Users/Services/ITokenInfrastructure.cs

@@ -0,0 +1,17 @@
+using System.Security.Claims;
+
+namespace Features.Users.Services;
+
+/// <summary>
+///     Service for generating and validating JSON Web Tokens (JWTs) used for authentication.
+/// </summary>
+public interface ITokenInfrastructure
+{
+    /// <summary>
+    ///     Generates a signed JWT for the given user.
+    /// </summary>
+    string GenerateJwt(Guid userId, string username, DateTime expiry, string secret);
+
+    /// <exception cref="Domain.Exceptions.UnauthorizedException">Thrown when the token is invalid, expired, or fails validation.</exception>
+    Task<ClaimsPrincipal> ValidateJwtAsync(string token, string secret);
+}