whille creating GoogleSignInoptions I fallow the steps presented on 'firebase' site
that are as fallow:
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
what is that String
It's automatically generated and you can see it at
can it vary or is it always "R.string.default_web_client_id"?
Since it is generated by compiling Google Services, it is always the same (at least until Google decides to rename it with an API update).