Create IdentityService in marketing API

src/Services/Marketing/Marketing.API/Infrastructure/Services/IIdentityService.cs

@@ -0,0 +1,12 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Microsoft.eShopOnContainers.Services.Locations.API.Infrastructure.Services
+{
+    public interface IIdentityService
+    {
+        string GetUserIdentity();
+    }
+}

src/Services/Marketing/Marketing.API/Infrastructure/Services/IdentityService.cs

@@ -0,0 +1,23 @@
+using Microsoft.AspNetCore.Http;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace Microsoft.eShopOnContainers.Services.Locations.API.Infrastructure.Services
+{
+    public class IdentityService : IIdentityService
+    {
+        private IHttpContextAccessor _context;
+
+        public IdentityService(IHttpContextAccessor context)
+        {
+            _context = context ?? throw new ArgumentNullException(nameof(context));
+        }
+
+        public string GetUserIdentity()
+        {
+            return _context.HttpContext.User.FindFirst("sub").Value;
+        }
+    }
+}

src/Services/Marketing/Marketing.API/Startup.cs

@@ -1,4 +1,7 @@
-namespace Microsoft.eShopOnContainers.Services.Marketing.API
+using Microsoft.AspNetCore.Http;
+using Microsoft.eShopOnContainers.Services.Locations.API.Infrastructure.Services;
+
+namespace Microsoft.eShopOnContainers.Services.Marketing.API
 {
     using Microsoft.AspNetCore.Builder;
     using Microsoft.AspNetCore.Hosting;
@@ -110,6 +113,8 @@
             });
 
             services.AddTransient<IMarketingDataRepository, MarketingDataRepository>();
+            services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();
+            services.AddTransient<IIdentityService, IdentityService>();
 
             //configure autofac
             var container = new ContainerBuilder();