Вытащил солюшен на уровень выше, чтобы прощё было дотнетить

ApplicationLayer/Services/AuthServices/LoginService/DevelopmentLoginService.cs

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+using ApplicationLayer.InfrastructureServicesInterfaces;
+using ApplicationLayer.Services.AuthServices.Common;
+using ApplicationLayer.Services.AuthServices.LoginService.Exceptions;
+using ApplicationLayer.Services.AuthServices.NeededServices;
+using ApplicationLayer.Services.AuthServices.Requests;
+using Domains.Users;
+
+namespace ApplicationLayer.Services.AuthServices.LoginService;
+
+public class DevelopmentLoginService(IUsersRepository users, ITokenGenerator tokenGenerator) : ILoginService
+{
+    async Task<AuthToken> ILoginService.LoginAsync(LoginRequest request, CancellationToken cancellationToken)
+    {
+        if (request.AuthData is { Email: "admin@mail.ru", Password: "admin" })
+        {
+            var admin = new User { Role = Role.Admin };
+
+            return tokenGenerator.CreateToken(admin);
+        }
+
+        var user = await users.FindByEmailAsync(request.AuthData.Email, cancellationToken);
+        if (user is null || user.Password != request.AuthData.Password)
+        {
+            throw new IncorrectLoginDataException();
+        }
+
+        return tokenGenerator.CreateToken(user);
+    }
+}

ApplicationLayer/Services/AuthServices/LoginService/Exceptions/IncorrectLoginDataException.cs

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+using ApplicationLayer.GeneralExceptions;
+
+namespace ApplicationLayer.Services.AuthServices.LoginService.Exceptions;
+
+public class IncorrectLoginDataException() : ApiException("Incorrect email or password");

ApplicationLayer/Services/AuthServices/LoginService/ILoginService.cs

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+using ApplicationLayer.Services.AuthServices.Common;
+using ApplicationLayer.Services.AuthServices.Requests;
+
+namespace ApplicationLayer.Services.AuthServices.LoginService;
+
+/// Handles login requests
+public interface ILoginService
+{
+    /// Handle login request
+    /// <returns>JWT-token</returns>
+    Task<AuthToken> LoginAsync(LoginRequest request, CancellationToken cancellationToken);
+}

ApplicationLayer/Services/AuthServices/LoginService/LoginService.cs

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+using ApplicationLayer.InfrastructureServicesInterfaces;
+using ApplicationLayer.Services.AuthServices.Common;
+using ApplicationLayer.Services.AuthServices.LoginService.Exceptions;
+using ApplicationLayer.Services.AuthServices.NeededServices;
+using ApplicationLayer.Services.AuthServices.Requests;
+
+namespace ApplicationLayer.Services.AuthServices.LoginService;
+
+/// <inheritdoc cref="ILoginService" />
+public class LoginService(IUsersRepository users, ITokenGenerator tokenGenerator) : ILoginService
+{
+    async Task<AuthToken> ILoginService.LoginAsync(LoginRequest request, CancellationToken cancellationToken)
+    {
+        var user = await users.FindByEmailAsync(request.AuthData.Email, cancellationToken);
+        if (user is null || user.Password != request.AuthData.Password)
+        {
+            throw new IncorrectLoginDataException();
+        }
+
+        return tokenGenerator.CreateToken(user);
+    }
+}