Two Factor Authentication Recovery/Backup codes
How to Use Recovery/Backup codes
After the two-factor authentication is enabled, a screen will appear that shows your recovery/backup codes. You can use these codes if you misplace your device or there is no internet available.
7- You can also use the download, print, and copy options to save them for later use.
8-After you have consumed all nine backup codes; you can regenerate codes to get backup codes again.
This is how you can use two-factor authentication to make your account more secure.