I use them as a developer to offer it to users, not Apple though and not for apps. But I wouldn't want any of those companies know which services I use. I am f

I use them as a developer to offer it to users, not Apple though and not for apps. But I wouldn't want any of those companies know which services I use. I am fine with using Auth0 or other third party providers, but only if I have to. You don't even need to verify the mail in my cases, you could even use a completely fictious one. Clean, easy, anonymous. Not really sure about smartphone hell, but most identity providers offer up the mail of the user anyway. Maybe that is different in phoneland though.