Login doesn't work on 6.43 about net_routeros HOT 3 OPEN

private static function _login(
        Communicator $com,
        $username,
        $password = '',
        $timeout = null
    ) {
        $request = new Request('/login');
        $request->setArgument('name', $username);
        $request->setArgument('password', $password);
        $request->send($com);
        $response = new Response($com, false, $timeout);
        return $response->getType() === Response::TYPE_FINAL;
    }