I had to restore my iPhone from a backup and in the process wiped out my Authenticator/two factor information, which disabled Homebridge authentication. No sweat, from Terminal.app:
sudo hb-service stop
Navigator to your home folder and Homebridge settings:
cd ~/.homebridge
Now rename auth.json:
mv auth.json auth_old.json
Restart homebridge:
sudo hb-service start
And with a browser navigate to you’ll be able to authenticate with admin/admin through Homebridge’s web user interface. In the upper righthand corner of your web browser’s tap the 3 dots, tap “User Accounts”, and finally tap “ENABLE 2FA” to re-enable two factor authentication.
Thanks you so much, this was exactly what I needed!