Just for basic authentication, nothing else. I'm planning on adding Email as another sign up method as some people don't wanna use their Google account!
I appreciate the Google sign in as time goes on. I know the risks and downsides, but it's nice to just quickly sign in and GTD. Last nice I set up a cheap wyze door bell cam and shared it with my mom (signed her up to wyze using sign in with google) It took longer to unpack and mount the camera with the VHB tape than it did to create and log into her account to accept the sharing request.