function deleteSubscription($params)
{
    if (!isset($params['uid'])) {
        return FALSE;
    }
    if (!isset($params['sid'])) {
        return FALSE;
    }
    // only the user herself can delete a subscription
    if ($params['uid'] != $params['__uid']) {
        echo json_encode(array('status' => 'permission_denied'));
        exit;
    }
    $pm = new sspmod_janus_Postman();
    $return = $pm->unSubscribe($params['uid'], $params['sid']);
    return $return;
}
function deleteSubscription($params)
{
    if (!isset($params['uid'])) {
        return FALSE;
    }
    if (!isset($params['sid'])) {
        return FALSE;
    }
    $pm = new sspmod_janus_Postman();
    $return = $pm->unSubscribe($params['uid'], $params['sid']);
    return $return;
}