Multi-factor authentication adds an extra layer of protection to your billing account. With multi-factor authentication you log in as normal with your email address and password. After that you are then prompted for a TOTP token, which you can get from a 2FA app, usually on your phone.
You can enable (or disable) multi-factor authentication as follows:

After you click the Click here to enable button you need to configure multi-factor authentication. The first screen asks what method you want to use. There is just one option; you can use any 2FA application to get security tokens.

Next, you need to connect your multi-factor authentication app. You can use any modern 2FA app, including Google Authenticator and Aegis.
If you use a 2FA app on your phone then you can open the app and scan the QR code. Alternatively, you can also manually add the 2FA token shown above the image.

Either way, your 2FA app should now be generating a six-digit tokens every 30 seconds. To complete the process, enter the token in the Enter authentication code field and click Submit,
You should now see a success message. The window also gives you a backup code, which you can use to access your account if you can’t access your 2FA app. For instance, if your phone suddenly dies then you can use the backup code in place of a 2FA token. You can then log in; disable multi-factor authentication and start again with a new 2FA app.
