Add GetCreatorByAlias and CreatorAlias to User

tests/Application.FunctionalTests/Testing.cs

@@ -63,7 +63,7 @@ public partial class Testing
     {
         using var scope = _scopeFactory.CreateScope();
 
-        var userManager = scope.ServiceProvider.GetRequiredService<UserManager<ApplicationUser>>();
+        var userManager = scope.ServiceProvider.GetRequiredService<ApplicationUserManager>();
 
         var user = new ApplicationUser { UserName = userName, Email = userName };