Laravel + Socket.io + Redis with laravel-echo

i tried to work with these. but i couldn't get work laravel-echo.

can you tell me what should i listen on laravel echo. this is my example code.

socket.js

var server = require('http').Server();

var io = require('socket.io')(server);

var Redis = require('ioredis');
var redis = new Redis();

redis.subscribe('tester', function (err, count) {
    //console.log('done');
});
redis.on('message', function (channel, message) {
    console.log(channel, message);
    message = JSON.parse(message);
    io.emit(message.event, message.data);
});

server.listen(3000);

app.js

import Echo from "laravel-echo";

var echo = window.Echo = new Echo({
    broadcaster: 'socket.io',
    host: 'http://localhost:3000'
});

echo.channel('tester').listen('UserSignedUp', function (d) {
    console.log('data', d);
});

UserSignedUp.php Event

<?php

namespace App\Events;

use Illuminate\Broadcasting\Channel;
use Illuminate\Queue\SerializesModels;
use Illuminate\Broadcasting\PrivateChannel;
use Illuminate\Broadcasting\PresenceChannel;
use Illuminate\Broadcasting\InteractsWithSockets;
use Illuminate\Contracts\Broadcasting\ShouldBroadcast;

class UserSignedUp implements ShouldBroadcast
{
    use InteractsWithSockets, SerializesModels;

    public $username;

    /**
     * Create a new event instance.
     *
     * @return void
     */
    public function __construct($username)
    {
        $this->username = $username;
    }

    /**
     * Get the channels the event should broadcast on.
     *
     * @return Channel|array
     */
    public function broadcastOn()
    {
        return ['tester'];
    }

}

what should i do to get work this..

via Chebli Mohamed