main project split, authpassword endpoint created

TimetableDesigner.Backend.Services.Authentication.Core/Commands/AuthPassword/AuthPasswordCommand.cs

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+using MediatR;
+
+namespace TimetableDesigner.Backend.Services.Authentication.Core.Commands.AuthPassword;
+
+public record AuthPasswordCommand
+(
+    string Email,
+    string Password,
+    bool RememberMe
+)
+: IRequest<AuthPasswordResult>;

TimetableDesigner.Backend.Services.Authentication.Core/Commands/AuthPassword/AuthPasswordHandler.cs

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+using MediatR;
+using Microsoft.EntityFrameworkCore;
+using TimetableDesigner.Backend.Services.Authentication.Core.Helpers;
+using TimetableDesigner.Backend.Services.Authentication.Database;
+using TimetableDesigner.Backend.Services.Authentication.Database.Model;
+
+namespace TimetableDesigner.Backend.Services.Authentication.Core.Commands.AuthPassword;
+
+public class AuthPasswordHandler : IRequestHandler<AuthPasswordCommand, AuthPasswordResult>
+{
+    private readonly DatabaseContext _databaseContext;
+    private readonly IPasswordHasher _passwordHasher;
+
+    public AuthPasswordHandler(DatabaseContext databaseContext, IPasswordHasher passwordHasher)
+    {
+        _databaseContext = databaseContext;
+        _passwordHasher = passwordHasher;
+    }
+    
+    public async Task<AuthPasswordResult> Handle(AuthPasswordCommand request, CancellationToken cancellationToken)
+    {
+        Account? account = await _databaseContext.Accounts.FirstOrDefaultAsync(x => x.Email == request.Email, cancellationToken);
+        if (account is null)
+        {
+            return AuthPasswordResult.Failure();
+        }
+
+        PasswordHashData hash = new PasswordHashData(account.Password, account.PasswordSalt);
+        if (!_passwordHasher.ValidatePassword(hash, request.Password))
+        {
+            return AuthPasswordResult.Failure();
+        }
+
+        return null;
+    }
+}

TimetableDesigner.Backend.Services.Authentication.Core/Commands/AuthPassword/AuthPasswordResult.cs

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+namespace TimetableDesigner.Backend.Services.Authentication.Core.Commands.AuthPassword;
+
+public record AuthPasswordResult
+{
+    public bool IsSuccess { get; }
+    public string? AccessToken { get; }
+    public string? RefreshToken { get; }
+
+    private AuthPasswordResult(bool isSuccess, string? accessToken, string? refreshToken)
+    {
+        IsSuccess = isSuccess;
+        AccessToken = accessToken;
+        RefreshToken = refreshToken;
+    }
+
+    public static AuthPasswordResult Success(string accessToken, string refreshToken) =>
+        new AuthPasswordResult(true, accessToken, refreshToken);
+    
+    public static AuthPasswordResult Failure() =>
+        new AuthPasswordResult(false, null, null);
+}