https://developer.android.com/reference/androidx/credentials/SignalCredentialStateRequest
SignalCredentialStateRequest | API reference | Android Developers
api referenceandroiddevelopers
https://developers.google.cn/android/reference/kotlin/com/google/android/gms/identitycredentials/SignalCredentialStateRequest
SignalCredentialStateRequest | Google Play services | Google for Developers
google play servicesdevelopers