If you submit an app to App Store and it has user authentication Apple Review Team will require Apple Signing to be implemented as one of the sign in options. So this plugin is a must have if you want to publish your app on App Store.
Moreover Sign in with Apple makes it easy for users to sign in to your apps and websites using their Apple ID. Instead of filling out forms, verifying email addresses, and choosing new passwords, they can use Sign in with Apple to set up an account and start using your app right away.
You must have a developer account with Apple to interact with the plugin. Create you development account at: https://developer.apple.com/sign-in-with-apple/get-started/
For details, screenshots and demos please visit the plugin page at: https://zeroqode.com/plugin/sign-in-with-apple-1575475552052x418799001167781100
Founder @ Zeroqode