Combine user models.

osu.Game/Users/User.cs

@@ -1,13 +1,23 @@
 // Copyright (c) 2007-2017 ppy Pty Ltd <contact@ppy.sh>.
 // Licensed under the MIT Licence - https://raw.githubusercontent.com/ppy/osu/master/LICENCE
 
+using Newtonsoft.Json;
+
 namespace osu.Game.Users
 {
     public class User
     {
-        public int Id;
+        [JsonProperty(@"id")]
+        public long Id = 1;
+
+        [JsonProperty(@"username")]
         public string Username;
+
         public Country Country;
+
         public Team Team;
+
+        [JsonProperty(@"colour")]
+        public string Colour;
     }
 }