public function Upload($contactFile, $allowUnsubscribe = false, $listID = null, $listName = null, $status = \ElasticEmailEnums\ContactStatus::Active, $consentDate = null, $consentIP = null, $consentTracking = \ElasticEmailEnums\ConsentTracking::Unknown) {
        return $this->sendRequest('contact/upload', array(
                    'allowUnsubscribe' => $allowUnsubscribe,
                    'listID' => $listID,
                    'listName' => $listName,
                    'status' => $status,
                    'consentDate' => $consentDate,
                    'consentIP' => $consentIP,
                    'consentTracking' => $consentTracking
        ), "POST", $contactFile);
    }