public async Task ListProducts()
        {
            APIResponse response = await GetProducts.ExecuteStrategy(null);

            if (response.IsSuccess)
            {
                var jsonSerializerSettings = new JsonSerializerSettings();
                jsonSerializerSettings.MissingMemberHandling = MissingMemberHandling.Ignore;
                Products = JsonConvert.DeserializeObject <List <ProductModel> >(response.Response, jsonSerializerSettings);
                foreach (var p in Products)
                {
                    p.UnitPriceString = p.UnitPrice.ToString("N0");
                    ProductsList.Add(p);
                }
            }
            else
            {
                Exception e;
            }
        }