RemoveItemFromCartActivity.cs

[FunctionName("RemoveItemFromCart")]
       public static async Task<IActionResult> RunAsync(
           [HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "cart/{id}/remove")] HttpRequestMessage req,
           Guid id,
           [DurableClient] IDurableClient client,  ILogger log)
       {
 
           if (id == Guid.Empty)
           {
               return (ActionResult) new BadRequestObjectResult("Id is required");
           }
               var entityId = new EntityId(nameof(ShoppingCartEntity),id.ToString());
 
               var data = await req.Content.ReadAsAsync<CartItem>();
 
               await client.SignalEntityAsync<IShoppingCart>(entityId, proxy => proxy.Remove(data));
 
               return (ActionResult) new AcceptedResult();
       }