https://firebase.google.com/docs/reference/android/com/google/firebase/auth/PhoneAuthProvider.OnVerificationStateChangedCallbacks?authuser=7
PhoneAuthProvider.OnVerificationStateChangedCallbacks | Firebase SDKs for Android
firebasesdksandroid
https://firebase.google.com/docs/reference/kotlin/com/google/firebase/auth/PhoneAuthProvider.OnVerificationStateChangedCallbacks?authuser=5
PhoneAuthProvider.OnVerificationStateChangedCallbacks | Firebase SDKs for Android
firebasesdksandroid