Google Sign In Kotlin

				<ImageView
				    android:id="@+id/signInGoogleButton"
				    android:layout_width="56dp"
				    android:layout_height="56dp"
				    android:layout_marginBottom="40dp"
				    android:background="@drawable/google"
				    android:contentDescription="@string/todo"
				    app:layout_constraintBottom_toBottomOf="parent"
				    app:layout_constraintEnd_toEndOf="parent"
				    app:layout_constraintStart_toStartOf="parent" />
			

				val  button = findViewById(R.id.signInGoogleButton)
				
				button.setOnClickListener {
				    signIn()
				}
			

				val gso = GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
				        .requestIdToken(getString(R.string.default_web_client_id))
				        .requestEmail()
				        .build()
				 
				googleSignInClient = GoogleSignIn.getClient(this, gso)
			

				override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
				    super.onActivityResult(requestCode, resultCode, data)
				 
				    if (requestCode == 9001) {
				        val task = GoogleSignIn.getSignedInAccountFromIntent(data)
				        try {
				            val account = task.getResult(ApiException::class.java)!!
				 
				            val intent = Intent(this, ProfileActivity::class.java).apply {
				                putExtra("full_name", account.displayName)
				                putExtra("email", account.email)
				                putExtra("photoUrl", account.photoUrl.toString())
				            }
				            this.startActivity(intent);
				        } catch (e: ApiException) {
				            Log.w("Error", "Google sign in failed", e)
				        }
				    }
				}
				 
				private fun signIn() {
				    val signInIntent = googleSignInClient.signInIntent
				    startActivityForResult(signInIntent, 9001)
				}