My next web server application should use a service such as OAuth2 for user authentication and management, ideally providing user hierarchy management via a web UI (eg. company -> department -> project -> user), optional 2FA etc. Is there a recommended provider or Marketplace product that works well with DigitalOcean droplets and provides these features? DigitalOcean do seem to have their own OAuth service but not the front-end I’d be looking for.