You should be prompted to re-enter your account info.

Google Factory Reset Protection for Pixel but similar):
https://support.google.com/pixelphone/answer/6172890

From Google, Can't unlock your Android device:
https://support.google.com/pixelphone/answer/3388218

Can't sign in to your Google Account:
https://support.google.com/accounts/troubleshooter/2402620

Reset your Google password:
https://www.google.com/accounts/recovery
(you may have to wait 1-2 days before the new password works)