/// <summary>
/// Adds an item to a specific basket.
/// If the item already exists in the basket, the quantity is increased instead.
/// </summary>
/// <param name="basketId">Basket ID</param>
/// <param name="itemRequest">Object with details for the item to be added
/// </param>
/// <returns>Action success response</returns>
public async Task <BasketAddItemResponse> AddBasketItem(int basketId, BasketAddItemRequest itemRequest)
{
return(await new ApiHttpClient(_baseAddress).PostAsJsonAsync <BasketAddItemResponse>(UriHelpers.AddBasketItemUri(basketId), itemRequest));
}