FPVPhoneVerificationActivityInit.kt

class PhoneVerificationActivity : AppCompatActivity(), PhoneCallbacks.PhoneCallbacksListener {

    private lateinit var auth: FirebaseAuth
    private var storedVerificationId: String? = null
    private lateinit var resendToken: PhoneAuthProvider.ForceResendingToken

    override fun onCreate(savedInstanceState: Bundle?) {
        ....
        auth = FirebaseAuth.getInstance()
        auth.setLanguageCode(Locale.getDefault().language)
        val phoneCallbacks = PhoneCallbacks(this)
        ...
        }
    ...
}