PHP - object programming, move code from ZF-OAuth2 AuthController to custom app -- 2

The previous developer implemented 2FA into our login screen but changed the default vendor libraries instead of our custom application code. We need to change it so the default vendor libraries stay in original form (automatic updates don't break them) and the custom code is in our app. The change was made in default file - vendor/zfcampus/zf-oauth2/src/Controller/AuthController.php .. class AuthController extends AbstractActionController