Is it possible to login-registration by selecting an account that is in the phone?

Question

Android

when the application starts, show accountpicker, the user selects one of his accounts, we get an email based on which we create a user in the database, we take the phone ID as a token.
or how to do it right?

Answer 1

https://developer.android.com/training/sign-in/ind... - right?
UPD: https://developers.google.com/android/guides/http-auth - as I understand it, like this. Asimilar answer has already been given here .