xamarin android - use custom login rather than web

Are there any examples out there for creating your own custom login page for a xamarin android app rather than forcing user to load auth0 in a browser? I’d like to be able to have users signup or login both with social and username/password. If I’m understanding correctly social will force users to view a browser to log in which I think is fine and expected. But it would be nice to have a more common login / signup page for my app that feels more natural. Any advice or pointing in the right direction would be greatly appreciated.