allow nullable expiry date

Femto.Database/Migrations/20250518193113_AddUserRole.sql

@@ -0,0 +1,9 @@
+-- Migration: AddUserRole
+-- Created at: 18/05/2025 19:31:13
+
+CREATE TABLE authn.user_role 
+(
+    user_id uuid REFERENCES authn.user_identity(id),
+    role    int,
+    primary key (user_id, role)
+);

Femto.Modules.Auth/Application/Interface/GetSignupCodesQuery/GetSignupCodesQueryHandler.cs

@@ -50,6 +50,6 @@ public class GetSignupCodesQueryHandler(IDbConnectionFactory connectionFactory)
         public string Name { get; set; }
         public Guid? RedeemedByUserId { get; set; }
         public string? RedeemedByUsername { get; set; }
-        public DateTimeOffset ExpiresOn { get; set; }
+        public DateTimeOffset? ExpiresOn { get; set; }
     }
 }