Not geting token Google Oauth - google-oauth

Question

I'm trying to use google API for login but for some reason both $_GET["code"] and $this->request->getVar('code') are empty and I can't fetch my token because of it. I have tried $_GET["code"] instead of $this->request->getVar('code') but nothing is working:
Error Image second image
I was following this video tutorial: click here
public function signup_with_gmail() {
require_once APPPATH.'Libraries\vendor\autoload.php';
$google_client = new \Google_Client();
//$google_client->setApplicationName("pharma");
$google_client->setClientId('clientID');
$google_client->setClientSecret('SECRET');
$google_client->setRedirectUri('http://localhost/pharma/User/sign_in');
$google_client->addScope('email');
$google_client->addScope('profile');
print_r($this->request->getVar('code') === NULL);
print_r($_GET['code']);
if ($this->request->getVar('code') != NULL) {
$token = $google_client->fetchAccessTokenWithAuthCode($this->request->getVar('code'));
if(!$token['error']){
$google_client->setAccessToken($token['access_token']);
$session->set('access_token', $token['access_token']);
//now get profile data create another object
$google_service = new \Google_Service_Oauth2($google_client);
$data = $google_service->userinfo->get();
print_r($data);
}
}
print_r($data);
}

Answer 1

The code in $this->request->getVar('code') will be generated only when you will hit the URL created using $google_client->createAuthUrl();
So, you can do it like this...
In Controller write
$data['loginButton'] = $google_client->createAuthUrl();
Pass this $data['loginButton'] to the view in the anchor tag for the Sign in with Google button.
Now when you will click on the Sign in with Google button it will redirect back to the same localhost.com/login URL but this time you will have the code in the URL. So you can fetch it with $this->request->getVar('code') and follow the rest of the process.
Please make sure all the detail like ClientId & ClientSecret is correct
And update to the latest "google/apiclient": "^2.10"