'your access token',
'refresh_token' => 'your refresh token');
$wrap = new CS_REST_General($auth);
$result = $wrap->get_systemdate();
echo "Result of /api/v3.1/systemdate\n
";
if($result->was_successful()) {
echo "Got system date\n
".$result->response->SystemDate;
} else {
echo 'Failed with code '.$result->http_status_code."\n
";
var_dump($result->response);
echo '';
}