How does two-factor authentication work?
Provide login credentials
The first half of the authentication process involves you entering your account login and password.
Passcode is sent to iPhone
Your chosen authenticator app will generate a unique verification code on-screen as a QR code to scan or numerical code via text message. These tokens will vary across different 2FA apps.
Verify the token
Your iPhone will then prompt you to confirm the unique token. This can be done by scanning the qr code or entering the numerical string sent to your iPhone.