Removed module projects because it can't work like that atm. Commented out package commands.

NadekoBot.Core/Modules/Xp/Services/UserCacheItem.cs

@@ -0,0 +1,21 @@
+using Discord;
+
+namespace NadekoBot.Modules.Xp.Services
+{
+    public class UserCacheItem
+    {
+        public IGuildUser User { get; set; }
+        public IGuild Guild { get; set; }
+        public IMessageChannel Channel { get; set; }
+
+        public override int GetHashCode()
+        {
+            return User.GetHashCode();
+        }
+
+        public override bool Equals(object obj)
+        {
+            return obj is UserCacheItem uci && uci.User == User;
+        }
+    }
+}