Call to undefined method CodeIgniter\HTTP\IncomingRequest::get()

PHP Code:
public function index()
 {
 $data =[];
 $google_client = new \Google_Client();
 $google_client->setClientId('clientID.apps.googleusercontent.com');
 $google_client->setClientSecret('my-secret');
 $google_client->setRedirectUri(base_url());
 $google_client->addScope('email');
 $google_client->addScope('profile');
 
 if($this->request->getVar('code')){
 $token = $google_client->fetchAccessTokenWithAuthCode($this->request->get('code'));
 
 if(!$token['error']){
 $google_client->setAccessToken($token['access_token']);

 session()->set('access_token',$token['access_token']);

 //get profile data
 $google_service = new \Google_Service_0auth2($google_client);
 
 //This is where i get the error
 $data = $google_service->userinfo->get();
 
 

 }
 }

 if(!session()->get('access_token')){
 $data['login_button'] = $google_client->createAuthUrl();
 }
 return view('login',$data);
 
 }