notification hub push registration service

src/Core/Services/NoopImplementations/NoopBlockIpService.cs

@@ -0,0 +1,13 @@
+using System.Threading.Tasks;
+
+namespace Bit.Core.Services
+{
+    public class NoopBlockIpService : IBlockIpService
+    {
+        public Task BlockIpAsync(string ipAddress, bool permanentBlock)
+        {
+            // Do nothing
+            return Task.FromResult(0);
+        }
+    }
+}