Fix account add/remove for extensions

Author: rtm516

bootstrap/geyser/src/main/java/com/rtm516/mcxboxbroadcast/bootstrap/geyser/MCXboxBroadcastExtension.java

@@ -91,10 +91,10 @@ public void onCommandDefine(GeyserDefineCommandsEvent event) {
 
                 switch (args[0].toLowerCase()) {
                     case "add":
-                        sessionManager.addSubSession(args[2]);
+                        sessionManager.addSubSession(args[1]);
                         break;
                     case "remove":
-                        sessionManager.removeSubSession(args[2]);
+                        sessionManager.removeSubSession(args[1]);
                         break;
                     default:
                         source.sendMessage("Unknown accounts command: " + args[0]);