public function submit($location, LassoLead $lead, $apiKey)
 {
     //open connection
     $curl = curl_init();
     curl_setopt($curl, CURLOPT_POST, true);
     curl_setopt($curl, CURLOPT_HEADER, 'application/json');
     curl_setopt($curl, CURLOPT_URL, $location);
     curl_setopt($curl, CURLOPT_POSTFIELDS, json_encode($lead->toArray()));
     curl_setopt($curl, CURLOPT_HTTPHEADER, array('X-Lasso-Auth:' . 'Token=' . $apiKey . ',Version=1.0'));
     curl_exec($curl);
     return $curl;
 }