Added models for presentation layer with data annotations

SchengenVisaApi/ApplicationLayer/Services/AuthServices/LoginService/ILoginService.cs

@@ -1,9 +1,11 @@
-namespace ApplicationLayer.Services.AuthServices.LoginService;
+using ApplicationLayer.Services.AuthServices.Requests;
+
+namespace ApplicationLayer.Services.AuthServices.LoginService;
 
 /// Handles login requests
 public interface ILoginService
 {
     /// Handle login request
     /// <returns>JWT-token</returns>
-    Task<string> LoginAsync(string email, string password, CancellationToken cancellationToken);
-}
+    Task<string> LoginAsync(LoginRequest request, CancellationToken cancellationToken);
+}