How can i remove a command on /help list?

Hello i have recently created commands for staff members on my server but even if the player is not a staff member by my plugin they can show the list of commands on /help that i don't want that they see, so how can i remove of the list if the player don't have a permission or a group on database?
My code for creating commands looks like this:

Main.php

PHP:

$this->getServer()->getCommandMap()->register('cmdtest', new cmdtestfile('cmdtest', $this));


cmdtestfile.php

PHP:

<?php
namespace server\commands;

use pocketmine\command\defaults\VanillaCommand;
use pocketmine\command\CommandSender;
use pocketmine\Player;

class cmdtestfile extends VanillaCommand {
    public function __construct($name, $plugin) {
        parent::__construct($name, "cmdtest", "cmdtest <bla bla>");
        $this->plugin = $plugin;
    }

    public function execute(CommandSender $sender, string $currentAlias, array $args) : bool  {      
      
    }

}


 

I think we can't.
But with older PocketMine-MP its working fine. If they don't have permission, they would'nt see a command that they can't execute on help list.

Im not sure if it possible to handle '/' when player type it, because its like client's side function right now.

 

Use a custom help plugin but you have to modify it one by one and you can remove anything from /help

 

You are not showing us the full code.

Try

PHP:

...

  if(!$sender->hasPermission("permission.node")){
    $sender->sendMessage("You do not have permission to use this command");
    return true;
  }