Implemented config for disabling account login at join.

TShockAPI/ConfigFile.cs

@@ -215,6 +215,9 @@ namespace TShockAPI
 
         [Description("Protect chests with region and build permissions")]
         public bool RegionProtectChests = false;
+
+        [Description("Disable users from being able to login with account password when joining")]
+        public bool DisableLoginBeforeJoin = false;
         
 		public static ConfigFile Read(string path)
         {

TShockAPI/GetDataHandlers.cs

@@ -246,7 +246,7 @@ namespace TShockAPI
         private static bool HandleConnecting(GetDataHandlerArgs args)
         {
             var user = TShock.Users.GetUserByName(args.Player.Name);
-            if (user != null)
+            if (user != null && !TShock.Config.DisableLoginBeforeJoin)
             {
                 args.Player.RequiresPassword = true;
                 NetMessage.SendData((int)PacketTypes.PasswordRequired, args.Player.Index);