function __construct($clientid, $secret)
{
//Get oauth token to access Itero API
$verbose = fopen('php://stderr', 'w');
$curl = curl_init();
$data = http_build_query(array('grant_type' => 'client_credentials'));
curl_setopt_array($curl, array(CURLOPT_URL => self::$oAuth, CURLOPT_POST => 1, CURLOPT_POSTFIELDS => $data, CURLOPT_HTTPAUTH => CURLAUTH_BASIC, CURLOPT_USERPWD => "{$clientid}:{$secret}", CURLOPT_RETURNTRANSFER => true, CURLOPT_VERBOSE => true, CURLOPT_STDERR => $verbose));
$response = curl_exec($curl);
$this->exit_on_error($curl);
$token = json_decode($response);
self::$auth = "Authorization: Bearer " . $token->access_token;
}
