Overtrue\Socialite\Providers\AbstractProvider::getTokenFields PHP Метод

    protected function getTokenFields($code)
    {
        return ['client_id' => $this->clientId, 'client_secret' => $this->clientSecret, 'code' => $code, 'redirect_uri' => $this->redirectUrl];
    }

 /**
  * Get the Post fields for the token request.
  *
  * @param string $code
  *
  * @return array
  */
 protected function getTokenFields($code)
 {
     return parent::getTokenFields($code) + ['grant_type' => 'authorization_code'];
 }