Added a way to login and register and a tools project

BrightGlimmer.Service/Interfaces/IUserService.cs

@@ -0,0 +1,14 @@
+using BrightGlimmer.Domain.Auth;
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace BrightGlimmer.Service.Interfaces
+{
+    public interface IUserService
+    {
+        string Login(string username, string password);
+        Task<string> RegisterAsync(User user, string password);
+    }
+}