Logging in via Google Authenticator - End User Experience Log in to the Avanan portal with the configured password. Open the Google Authenticator app and copy the six-digit authentication code for the Avanan portal. Note: The six-digit authentication code is valid only for 30 seconds. After 30 seconds, a new code is generated. Enter the authentication code from the Google Authenticator app in the MFA Code field in the Avanan portal. Click Submit. After successful authentication, the user is logged into the Avanan portal.