With iOS 13 coming in the fall Apple is adding the option to login with your Apple id and is also requiring apps with facebook/google logins to add the Apple login as well. We use facebook to link accounts on playfab so users can do cross play on their devices and not worry about losing progress when switching devices. Is support for linking accounts coming for Apple id logins?
https://www.macrumors.com/2019/06/03/sign-in-with-apple-required-as-sign-in-option/
