Cleaning things up and getting add item to cart working for anonymous or authenticated users.

src/Infrastructure/Identity/ApplicationUser.cs

@@ -0,0 +1,10 @@
+using Microsoft.AspNetCore.Identity.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore;
+
+
+namespace Infrastructure.Identity
+{
+    public class ApplicationUser : IdentityUser
+    {
+    }
+}