As of my last knowledge update in September 2021, Google offered several methods for two-factor authentication (2FA), including the use of the Google Authenticator app, phone prompts, and hardware security keys, among others. However, AirPass doesn't appear to be a standard term associated with Google's 2FA methods.
Step 1 : To set up 2FA for your Google account linked to BUSY, you would typically use one of the following methods:
Step 2 : Go to your Google Account settings by visiting https://myaccount.google.com/.
Step 3 : Click on Security or Sign-in & security.
Step 4 : Locate the Two-step verification or Two-factor authentication section and click Turn on or Get started.
Step 5 :Follow the on-screen instructions to set up 2FA using one of the available methods.
Please note that Google's security features and settings may have evolved since my last knowledge update in September 2021, so it's essential to refer to Google's official documentation or support resources for the most up-to-date information on setting up two-factor authentication for your Google account.