//public int level_id;


    public async void deleteMap(int level_id, int index)
    {
        if (level_id != -1)
        {
            HttpClient client = new HttpClient();
            await client.PostAsync(backendUrl + "level?type=2&level_id=" + level_id.ToString(), null);
        }
        LocalSlot ls = new LocalSlot();

        ls.DeleteSlotMap(index - deleted_item_size);
        deleted_item_size += 1;
    }