I am developing and ASP.NET MVC App as the frontend with the ServiceStack being used for the API and, Authentication and services.
Is there any sample application or docs I could use for inspiration how to integrate the ServiceStack authentication with the ASP.NET [Authorize] attribute?
MVC and ServiceStack Auth are completely different and share no implementation. ServiceStack uses its own [Authenticate] attribute for its Services which you can also use in your MVC Controllers that inherit ServiceStackController.