The code generator option requires an authenticator app to be downloaded to your smartphone. You can download the ID.me Authenticator app or another authenticator app, such as Google Authenticator, Duo Mobile, etc. from the App Store.
If you choose the code generator option, you will be presented with a page that will give you instructions and a QR code to scan.
Use the authenticator app of your choice to scan the QR code. Once scanned, the app will generate a 6-digit code to be used on the next page.
After scanning the QR code, enter the 6-digit code into the field provided and click “Continue.” If the code matches, you will see a screen confirming that you’ve completed the MFA enrollment process.