identity: simplify user sign up

Streetwriters.Identity/Interfaces/ITokenGenerationService.cs

@@ -19,6 +19,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 using System.Security.Claims;
 using System.Threading.Tasks;
+using IdentityServer4.ResponseHandling;
 using IdentityServer4.Validation;
 using Streetwriters.Common.Models;
 
@@ -26,8 +27,9 @@ namespace Streetwriters.Identity.Interfaces
 {
     public interface ITokenGenerationService
     {
-        Task<string> CreateAccessTokenAsync(User user, string clientId);
-        Task<string> CreateAccessTokenFromValidatedRequestAsync(ValidatedTokenRequest validatedRequest, User user, string[] scopes, int lifetime = 60);
-        Task<ClaimsPrincipal> TransformTokenRequestAsync(ValidatedTokenRequest request, User user, string grantType, string[] scopes, int lifetime = 20 * 60);
+        Task<string> CreateAccessTokenAsync(User user, string clientId, int lifetime = 1800);
+        Task<string> CreateAccessTokenFromValidatedRequestAsync(ValidatedTokenRequest validatedRequest, User user, string[] scopes, int lifetime = 1200);
+        Task<ClaimsPrincipal> TransformTokenRequestAsync(ValidatedTokenRequest request, User user, string grantType, string[] scopes, int lifetime = 1200);
+        Task<TokenResponse?> CreateUserTokensAsync(User user, string clientId, int lifetime = 1800);
     }
 }