How to Add an Account to Google Authenticator You need two things: Google's authenticator app and a code from the account you want to add to the app (Facebook, Amazon, your bank, etc.).

When logging in to any accounts you’ve connected to Google Authenticator, you’ll open the app, locate the impermanent code associated with that account, and use it to finish the process.

Choosing 2FA authenticator apps can be hard. Ars did it so you don’t have to Losing your 2FA codes can be bad. Having backups stolen can be worse. What to do?