add gslt login option (#515)

(cherry picked from commit c81f139fe6b5de0c9f7a005dc2cbe576f4ca8f67)

Torch.API/ITorchConfig.cs

@@ -31,6 +31,8 @@ namespace Torch
         int FontSize { get; set; }
         UGCServiceType UgcServiceType { get; set; }
         bool EntityManagerEnabled { get; set; }
+        string LoginToken { get; set; }
+        
         void Save(string path = null);
     }
 }

Torch.Server/Patches/SteamLoginPatch.cs

@@ -0,0 +1,35 @@
+using System.Reflection;
+using NLog;
+using Steamworks;
+using Torch.Managers.PatchManager;
+using Torch.Utils;
+
+namespace Torch.Patches;
+
+[PatchShim]
+public static class SteamLoginPatch
+{
+    private static readonly ILogger Log = LogManager.GetCurrentClassLogger();
+    
+    [ReflectedMethodInfo(null, "LogOnAnonymous", TypeName = "VRage.Steam.MySteamGameServer, VRage.Steam")]
+    private static readonly MethodInfo LoginMethod;
+
+    public static void Patch(PatchContext context)
+    {
+        context.GetPattern(LoginMethod).AddPrefix();
+    }
+        
+    private static bool Prefix()
+    {
+#pragma warning disable CS0618
+        var token = TorchBase.Instance.Config.LoginToken;
+#pragma warning restore CS0618
+
+        if (string.IsNullOrEmpty(token))
+            return true;
+
+        Log.Info("Logging in to Steam with GSLT");
+        SteamGameServer.LogOn(token);
+        return false;
+    }
+}

Torch.Server/TorchConfig.cs

@@ -109,6 +109,9 @@ public class TorchConfig : ViewModel, ITorchConfig
              GroupName = "Server")]
     public bool EntityManagerEnabled { get; set; } = true;
 
+    [Display(Name = "Login Token", Description = "Steam GSLT (can be used if you have dynamic ip)", GroupName = "Server")]
+    public string LoginToken { get; set; }
+    
     // for backward compatibility
     public void Save(string path = null) => Initializer.Instance?.ConfigPersistent?.Save(path);
 }