Android Question Oauth2, which Google account was used?

[alain bertrand]

The user allows the app to use Google services (apis: drive, people, gmail, calendar) through oauth2.
How can I find back the google account used to give this authorization?

 

[Erel]

The example shows how to get the email address: https://www.b4x.com/android/forum/threads/class-b4x-google-oauth2.79426/#content