public Shop AddMenu(Menu menu, string shopId)
{
var shop = dac.GetShop(x => x._id == shopId);
var shopmenu = shop.Menus.ToList();
menu._id = Guid.NewGuid().ToString();
menu.CreateDate = DateTime.UtcNow;
shopmenu.Add(menu);
shop.Menus = shopmenu;
dac.UpdateShop(shop);
return(shop);
}