I'd like to connect my app with firebase, but I would like to use the authentication of Google. I am following this guide for android developers which you can see in the docs of Firebase.
I've implemented all the steps correctly, but I've a problem with a packet of GooglePlayServices, maybe .Auth, I don't know, like you can see,
in Android.Gms.Auth.Api.SignIn _ I'm not able to get the class _GoogleSignInClient,.
I can get the classes: