I Created Apple Login & Apple Login with Firebase for Godot! 
Hey fellow Godot devs! I’ve built Apple Login and Apple Login with Firebase plugins for the Godot Game Engine, making it much easier to integrate Apple Sign-In into your games. No more struggling with complex setups—just plug and play!
Apple Login with Firebase → GitHub - BadalAc/godot-apple-login-firebase
Apple Login (Without Firebase) → GitHub - BadalAc/godot-apple-ios-login-plugin
If you run into any issues, feel free to DM me on Reddit with details. Happy coding! 
To check the plugin in action download IOS game : Ludo game made with Godot