| GoogleAuthUtil | GoogleAuthUtil provides static utility methods to acquire and invalidate authentication tokens. |
| GoogleAuthException | GoogleAuthExceptions signal Google authentication errors. |
| GooglePlayServicesAvailabilityException | GooglePlayServicesAvailabilityExceptions are special instances of
UserRecoverableAuthExceptions which are thrown when the expected Google Play services app
is not available for some reason. |
| UserRecoverableAuthException | UserRecoverableAuthExceptions signal Google authentication errors that can be recovered with user action, such as a user login. |
| UserRecoverableNotifiedException | UserRecoverableNotifiedException signals that there was a Google authentication error which can be recovered with user action and has been handled by publishing a notification for the user to act on. |