Update to Onion Architecture.

Back/skydiveLogs-api.Business/Interfaces/IUserService.cs

@@ -0,0 +1,13 @@
+using skydiveLogs_api.Domain;
+
+namespace skydiveLogs_api.Business.Interfaces
+{
+    public interface IUserService
+    {
+        User GetByLogin(string login, string password);
+
+        User GetById(int userId);
+
+        bool AddNewUser(User user);
+    }
+}