injected Auth service
A callback method that is invoked immediately after the default change detector has checked the directive's data-bound properties for the first time, and before any of the view or content children have been checked. It is invoked only once when the directive is instantiated.
onSignIn event handler.
Close the dialog once the user signs in
Uses FirebaseUI to display an Signin with Google sign-in screen.
The signin flow is hanlded via Google OAuth using popups.