public function adviserChange($id_adviser, $id_event)
{
$eventModel = new Event();
$event = $eventModel->findOne($id_event);
$id_meeting = $event->id_meeting;
$id_contact = $event->id_contact;
$event->responsible_adviser = $id_adviser;
$event->save();
$meetingModel = new Meeting();
$meeting = $meetingModel->findOne($id_meeting);
$meeting->id_user = $id_adviser;
$meeting->save();
return $id_contact;
}
