https://www.developer-tech.com/news/2019/jun/13/force-app-developers-sign-in-apple/

Apple is forcing app developers using third-party sign-ins to adopt its 'Sign in with Apple' alternative.

The new button was debuted at this year’s WWDC and offers an innovative solution to a serious problem. Rather than sign-in via a service which collects data – like those from Facebook, Twitter, and Google – users can benefit from the convenience of such logins but also protect their privacy.