There are many examples now, of how to do Xamarin.Auth in Forms. But not any that address doing Auth in the context of an MVVM project. (I am using FreshMVVM)
I have found Joe Suave's explanation and repo - http://www.joesauve.com/using-xamarin-auth-with-xamarin-forms/. But is there a way to do it in pure PCL? Or will I have to implement PageRenderers for iOS & Android and Navigate to them as a normal Page?