Hello
Can you kindly confirm if the Google product in question is Google Authenticator app [1] which provides a two-step verification service or the Google Identity [2, 3] which makes use of a Google account to sign-in to a website. Once we have the information, we can direct you to the proper support.
Regards
[1] https://www.google.ca/landing/2step/#tab=why-you-need-it
[2] https://developers.google.com/identity
[3] https://developers.google.com/identity/protocols/oauth2