Initial commit carried over from private repo. This is V2.

code/MessengerApi.Db.Contracts/Entities/UserRoute.cs

@@ -0,0 +1,16 @@
+using MessengerApi.Db.Contracts.Entities;
+
+namespace MessengerApi.Db.Entities
+{
+    /// <summary>
+    /// Describes allowed message route (who can message whom).
+    /// </summary>
+    public class UserRoute : IEntity<UserRoute>
+    {
+        public Guid Id { get; set; }
+
+        public User From { get; set; }
+
+        public User To { get; set; }
+    }
+}