public static function _doModifySquad()
{
$params = ['id' => $_POST['squad_id'], 'leader_id' => $_POST['leader_id']];
Squad::modify($params);
// update member position, squad id
if ($params['leader_id']) {
$params = ['id' => $params['leader_id'], 'position_id' => 5, 'squad_id' => 0];
Member::modify($params);
}
}