07-29-2017, 06:25 PM
Firestorm is correct, it shouldn't have any effect on your logins. It happens quite often with all OAuth applications and all that Google or Facebook does is reauthenticate the user with a new token that you'll store in your fresh database. Tokens will naturally expire over time if unused, so someone who doesn't log in for a certain amount of time (60 days for Facebook) would have to reauthenticate anyway.