Two-factor authentication (2FA) adds extra security to protect your account, your data, and your online wallet. We require either SMS or an authenticator app like Google Authenticator for all registered users. SMS authentication will send a 6-digit signal to your mobile number within a few seconds. Enter the digits within 60 seconds, or the app will time out, and you will need to request a new code. If you choose to use an authenticator app, scan the QR code in your authenticator app to register your device with us. Again, you have 60 seconds to enter the 6-digit code when you log in.