OnLogout, Steam platform auth in account creation. Not configurable to ensure server uses ticket to validate.

Core/SteamPlatform.cs

@@ -0,0 +1,46 @@
+using Il2CppInterop.Runtime;
+using Steamworks;
+using System;
+using undead_universal_patch_il2cpp.Core.Content.CustomRecNet;
+using UnityEngine;
+
+namespace undead_universal_patch_il2cpp.Core;
+
+public class SteamPlatform : MonoBehaviour
+{
+    public static string AuthTicket { get; set; } = null;
+
+    void GetAuthTicket() {
+        SteamPlatformManager manager = PlatformManager.Instance.GetComponentInChildren<SteamPlatformManager>();
+        manager.GetAuthSessionTicket().Then(
+            DelegateSupport.ConvertDelegate<Il2CppSystem.Action<SteamPlatformManager.AuthSessionTicket>>((SteamPlatformManager.AuthSessionTicket ticket) =>
+        {
+            if (!string.IsNullOrEmpty(ticket.Error)) UniversalPatchPlugin.Log.LogError($"Could not get Steam auth ticket!: {ticket.Error}");
+            else
+            {
+                AuthTicket = BitConverter.ToString(ticket.Ticket).Replace("-", "").ToUpperInvariant().TrimEnd('0');
+                Util.ConditionalDebug($"Got new Steam auth ticket");
+            }
+        }));
+    }
+
+    void Start()
+    {
+        RecNetInteractions.onLogout.Add(GetAuthTicket);
+        RecNetInteractions.onPlatformInitialize.Add(GetAuthTicket);
+
+        /*
+           Every time the user logs out of matchmaking
+           or when PlatformManager initializes, fetch a new ticket.
+           The user might be logging out to the account selection screen
+           where they might create a new one; a Steam auth ticket is added to
+           the auth params in the create request and it must be valid.
+
+           It *is* possible (though very unlikely) that the user creates a new account
+           before the first ticket is fetched, since the method that gets a ticket is
+           an IPromise.
+
+           If this way of doing things isn't the best, fix it and I'll merge
+        */
+    }
+}