Sending fax with php code, Fax sending without attachments. <?php$ch = curl_init();curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);curl_setopt($ch, CURLOPT_URL, "https://platform.ringcentral.com/restapi/oauth/token");curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);curl_setopt($ch, CURLOPT_POSTFIELDS, "username=+xxxxxx&password=password#&extension=102&grant_type=password");curl_setopt($ch, CURLOPT_POST, 1);curl_setopt($ch, CURLOPT_USERPWD, "PYS9kaDdSey5j72ljRCfDw" . ":" . "JV4wWOkJTX5sJf-OZDD_fgJJ-uZODeSPeXxdhMUtsTAN");$headers = array();$headers[] = "Accept: application/json";$headers[] = "Content-Type: application/x-www-form-urlencoded";curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);$result = curl_exec($ch);$results = (json_decode($result));$token = $results -> access_token;$ch = curl_init();curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);curl_setopt($ch, CURLOPT_URL, "https://platform.ringcentral.com/restapi/v1.0/account/~/extension/~/fax");curl_seto