Add finalizer to `UserID` class

sources/Users/UserID.uc

@@ -1,6 +1,6 @@
 /**
  *      Acedia's class for storing user's ID.
- *      Copyright 2020-2021 Anton Tarasenko
+ *      Copyright 2020-2022 Anton Tarasenko
  *------------------------------------------------------------------------------
  * This file is part of Acedia.
  *
@@ -45,6 +45,17 @@ var protected SteamID   initializedData;
 //  after `initialized` is set to `true`.
 var protected bool      initialized;
 
+protected function Finalizer()
+{
+    initialized = false;
+    _.memory.Free(initializedData.steamID64);
+    initializedData.steamID64   = none;
+    initializedData.accountType = 0;
+    initializedData.universe    = 0;
+    initializedData.instance    = 0;
+    initializedData.steamID32   = 0;
+}
+
 //  Given a number in form of array (`digits`) of it's digits
 //  (425327 <-> [4, 2, 5, 3, 2, 7])
 //  return given number mod 2 and