The backed of the app allows sign in through the simple login (email/phone, password) and also third-party login using Google, Facebook, Apple
For Google and Facebook it's easy to do for Android apps (native support, they have the libraries):
Google: https://developers.google.com/identity/sign-in/android/start-integrating it gives AuthCode after sign in and backed can retrieve the AccessToken on its side but also Andorid app itself can get AccessToken and sent it to the backedn by making a POST request
"https://www.googleapis.com/oauth2/v4/token"(though in this case you need to add Google Cloud project SecretKey directly to the app, which is not recommended) https://stackoverflow.com/a/34690930/7767664Facebook: https://developers.facebook.com/docs/facebook-login/android/ it gives AccessToken after sign in
How can we do it for Android app with AppleID? I didn't find any full example for Android
https://developer.apple.com/documentation/sign_in_with_apple/sign_in_with_apple_rest_api Here Apple says
To sign in from a web app or other platform, like Android, use Sign in with Apple JS
https://developer.apple.com/documentation/sign_in_with_apple/sign_in_with_apple_js
Should I create WebView or create an intent to open AppleId login page and it should redirect to the app with deep link after sign in? I'm not sure how it should work
A real working example would be great
https://firebase.google.com/docs/auth/android/apple Here I found documentation for Apple login for Android app if you use Firebase as the backend for the app and use Firebase Auth to sign in. But in my case I don't use Firebase backend
