yii\authclient\BaseClient::setUserAttributes PHP Method

    public function setUserAttributes($userAttributes)
    {
        $this->_userAttributes = $this->normalizeUserAttributes($userAttributes);
    }

 /**
  * Retrieves additional profile information which can be needed for first-login(registration)
  * and which was not provided by first api call.
  * Returns merged user attributes
  * @param \yii\authclient\BaseClient $client
  * @return \yii\authclient\BaseClient Client with merged attributes
  */
 public static function retrieveAdditionalData(\yii\authclient\BaseClient $client)
 {
     $attributes = $client->getUserAttributes();
     switch ($client->className()) {
         case 'app\\modules\\user\\authclients\\GitHub':
             try {
                 $emails = $client->api('user/emails');
                 foreach ($emails as $email) {
                     if ($email['primary'] === true) {
                         $attributes['email'] = $email['email'];
                         break;
                     }
                 }
             } catch (\yii\authclient\InvalidResponseException $e) {
                 // no email :-(
             }
             break;
         default:
             break;
     }
     $client->setUserAttributes($attributes);
     return $client;
 }