Initial Commit ...

Providers/XPushProvider.cs

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+using xPushService.Interfaces;
+
+namespace xPushService.Providers {
+    public class XPushProvider : IXPushProvider { }
+}

Providers/XPushServiceUserNameProvider.cs

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+using Microsoft.AspNetCore.SignalR;
+
+namespace xPushService.Providers {
+    public class XPushServiceUserNameProvider : IUserIdProvider {
+        public string GetUserId (HubConnectionContext connection) {
+            //
+            var result = connection.User?.Identity?.Name;
+            return result;
+        }
+    }
+}