feat: add token validation to repository and confirmation service

src/Core/Infrastructure/Infrastructure.Repository/Auth/AuthRepository.cs

@@ -107,6 +107,45 @@ public class AuthRepository(ISqlConnectionFactory connectionFactory)
         await command.ExecuteNonQueryAsync();
     }
 
+    public async Task<Domain.Entities.UserAccount?> GetUserByIdAsync(
+        Guid userAccountId
+    )
+    {
+        await using var connection = await CreateConnection();
+        await using var command = connection.CreateCommand();
+        command.CommandText = "usp_GetUserAccountById";
+        command.CommandType = CommandType.StoredProcedure;
+
+        AddParameter(command, "@UserAccountId", userAccountId);
+
+        await using var reader = await command.ExecuteReaderAsync();
+        return await reader.ReadAsync() ? MapToEntity(reader) : null;
+    }
+
+    public async Task<Domain.Entities.UserAccount?> ConfirmUserAccountAsync(
+        Guid userAccountId
+    )
+    {
+        var user = await GetUserByIdAsync(userAccountId);
+        if (user == null)
+        {
+            return null;
+        }
+
+        await using var connection = await CreateConnection();
+        await using var command = connection.CreateCommand();
+        command.CommandText = "USP_ConfirmUserAccount";
+        command.CommandType = CommandType.StoredProcedure;
+
+        AddParameter(command, "@UserAccountId", userAccountId);
+
+        await command.ExecuteNonQueryAsync();
+
+        // Fetch and return the updated user
+        return await GetUserByIdAsync(userAccountId);
+    }
+
+
     /// <summary>
     /// Maps a data reader row to a UserAccount entity.
     /// </summary>

src/Core/Infrastructure/Infrastructure.Repository/Auth/IAuthRepository.cs

@@ -60,4 +60,19 @@ public interface IAuthRepository
     /// <param name="userAccountId">ID of the user account</param>
     /// <param name="newPasswordHash">New hashed password</param>
     Task RotateCredentialAsync(Guid userAccountId, string newPasswordHash);
+
+    /// <summary>
+    /// Marks a user account as confirmed.
+    /// </summary>
+    /// <param name="userAccountId">ID of the user account to confirm</param>
+    /// <returns>The confirmed UserAccount entity</returns>
+    /// <exception cref="UnauthorizedException">If user account not found</exception>
+    Task<Domain.Entities.UserAccount?> ConfirmUserAccountAsync(Guid userAccountId);
+
+    /// <summary>
+    /// Retrieves a user account by ID.
+    /// </summary>
+    /// <param name="userAccountId">ID of the user account</param>
+    /// <returns>UserAccount if found, null otherwise</returns>
+    Task<Domain.Entities.UserAccount?> GetUserByIdAsync(Guid userAccountId);
 }