My app crashes on google sign-in
Clash Royale CLAN TAG #URR8PPP My app crashes on google sign-in I am integrating google sign-in into my android project using Firebase. Following this tutorial, I was able to get the login. But when I choose the account, the app crashes. By the way I am using Kotlin language. The code snippet is as follows: class SignupActivity:AppCompatActivity(){ lateinit var googleSignInClient: GoogleSignInClient lateinit var gso: GoogleSignInOptions val RC_SIGN_IN :Int =1 lateinit var signOut:Button lateinit var mAuth: FirebaseAuth private var callbackManager: CallbackManager?=null @RequiresApi(Build.VERSION_CODES.JELLY_BEAN_MR1) override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.signup) header_signup_button.setOnClickListener { startActivity(Intent(this,SplashscreenActivity::class.java)) } gso = GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN) .requestIdToken(getString(R.string.defa...