don't work

$user = $client->query('/ip/hotspot/ip-binding/print', ['mac-address', '00:00:00:00:00:A9'])->read();
if (isset($user[0]['.id'])) {
$userId = $user[0]['.id'];
$removeUser = $client->query('/ip/hotspot/ip-binding/remove', ['.id', $userId])->read();
print_r($removeUser);
}

Result:
Array ( )
Don't remove