protected function getDataFromUrl($url)
    {
        $auth = $this->getAuthenticationObject();
        
        $process = curl_init($url);
        curl_setopt($process, CURLOPT_HEADER, 0);
        // setting the authentication header
        curl_setopt($process, CURLOPT_HTTPHEADER, array(
            "Authorization: " . $auth->getTokenType() . " " . $auth->getAccessToken()
        ));
        curl_setopt($process, CURLOPT_TIMEOUT, 30);
        curl_setopt($process, CURLOPT_RETURNTRANSFER, TRUE);
        $returnData = curl_exec($process);
        curl_close($process);
        
        return $returnData;
    }