Google Authenticator is a two-factor authentication app that provides an additional layer of security for your Google account. If you lose your phone or somehow delete the Google Authenticator app, you can get backup codes to use as a temporary replacement.
To get backup codes, open the Google Authenticator app and tap the three lines in the top left corner. Scroll down and tap “Backup codes.”
The backup codes will be displayed. Tap the “Copy” button to copy the codes …