azure mobile services offers a nice authorization / authentication framework. On a client I can simply use something like
user = await App.MobileService
.LoginAsync(MobileServiceAuthenticationProvider.Facebook);
to login to my backend. As Microsoft writes in azure documentation this is a "...tukey solution...". Is there a "non azure" implementation of this available?
My goal - enhance an existing ASP.NET MVC 5 site with the ability for "non web" (Xamarin and UWP) clients to login and use WEB Api calls and SignalR with authentication.