How we could get unique ID from CredentialManager?

[Thaina]

Since GoogleSignInAccount was deprecated. I try to find a way to get unique ID but there is no api related to getting the user's ID from GoogleIdTokenCredential nor AuthorizationResult except AuthorizationResult.toGoogleSignInAccount

Is it intentional to discourage requesting user's ID or are there other way to get/generate unique ID that I couldn't found from CredentialManager or Identity.getAuthorizationClient ?

EDIT: I have notice that actually getId will return email. But this is confusing and it then can't let me get the unique id instead