public static function getConsultantProteges($consultant_id)
 {
     $proteges = User::getProtege();
     $consultant_code = User::getCode($consultant_id);
     $response = array();
     foreach ($proteges as $protege) {
         $protege_id = $protege->ID;
         $protege_code = User::getConsultantCode($protege_id);
         if ($protege_code === $consultant_code) {
             array_push($response, $protege_id);
         }
     }
     return $response;
 }