public static function find_users_by_task($id)
 {
     $result = ZadatakKorisnik::execute_query("SELECT k.id, k.ime,k.prezime,kz.created_at FROM " . self::$table_name . " kz LEFT JOIN korisnici k ON kz.korisnik_id = k.id WHERE kz.zadatak_id = {$id};", "klasa");
     return $result;
 }