Laravel Ratchet socket Auth

I am starting learning Ratchet (reactPHP) I am using laravel. But I came to a line about security. How can I deny websocket connection based on user is logged in or not

public function onOpen(ConnectionInterface $conn)
    {
        $this->clients->attach($conn);
        $this->users[$conn->resourceId] = $conn;
        if(Auth::check()){
            echo 'user logged in';
        }else{
            echo "New connection! ({$conn->resourceId})\n";
        }

    }

I used something like this but it passes the Auth::check and console always shows New Connection.

via Chebli Mohamed