android:

android: URL scheme

[1] Sign In Using ID Tokens  |  Smart Lock for Passwords on Android  |  Google Developers () <https://developers.google.com/identity/smartlock-passwords/android/idtoken-auth>

The aud claim of an ID token from Smart Lock for Passwords has the following format:

android://SHA512_HASH@ANDROID_PACKAGE_NAME

The value SHA512_HASH is the SHA-512 hash of your signing certificate.