public async Task Change(string userId, WareHouse wareHouse)
        {
            var wh = _context.WareHouses.Where(user => user.UserId == userId).First(wh => wh.Id == wareHouse.Id);
            if (wh != null)
            {
                wareHouse.OnChange(userId);
                wh = wareHouse;
                await _context.SaveChangesAsync();
            }
            else
            {
                throw new EntityException("Warehouse not found");
            }
        }