Problem with getSearchRecords

Hello, I am receiving

<response><error><code>4834</code><message>Invalid Ticket Id</message></error></response>

I am trying to getSearchRecords with contacts I am not sure where my problem is at all. Any help would be greatly appreciated

$plumberCode = htmlspecialchars($_POST['PlumCode']);
             $token = htmlspecialchars($_POST['token']);


    $url = "https://crm.zoho.com/crm/private/xml/Contacts/getSearchRecords";
    $param= "authtoken=$token&scope=crmapi&selectColumns=Contacts(First Name,Last Name,Nom du Compte)&searchCondition=(Numéro de technicien|=|$plumberCode)";
    /* initialize curl handle */
    try {
            $ch = curl_init();
            /* set url to send post request */
            curl_setopt($ch, CURLOPT_URL, $url);
            /* allow redirects */
            curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
            /* return a response into a variable */
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            /* times out after 30s */
            curl_setopt($ch, CURLOPT_TIMEOUT, 30);
            /* set POST method */
            curl_setopt($ch, CURLOPT_POST, 1);
            /* add POST fields parameters */
            curl_setopt($ch, CURLOPT_POSTFIELDS, $parameter);
            /* execute the cURL */
            $result = curl_exec($ch);
            curl_close($ch);
            echo $result;

            return $result;
        } catch (Exception $exception) {
             echo'Exception Message: ' . $exception->getMessage() . '<br/>';
             echo'Exception Trace: ' . $exception->getTraceAsString();
        }

The issue I am not sure on, is since some of the information is written in French, do the "Account Name" Variables switch to french as well ("Nom du Compte") or do I have to switch them to english and figure them out.

Thank you