Pusher Laravel-echo error 401 Unauthorized

I'm having an 401 Unauthorized error, Please help me !

Config/App.php

App\Providers\BroadcastServiceProvider::class,

BroadcastServiceProvider.php

Broadcast::routes(['middleware' => ['jwt.auth']]);

require base_path('routes/channels.php');

Bootstrap.js

import Echo from 'laravel-echo'
window.Pusher = require('pusher-js');
window.Pusher.logToConsole = true;
window.Echo = new Echo({
    broadcaster: 'pusher',
    key: '6f45c006cfba3fbc72c2',
    cluster: 'ap1',
    encrypted: true,
    auth: {
        headers: {
            'Authorization': 'Bearer ' + window.localStorage.getItem('authToken')
        },
    },
});

Channel.php

Broadcast::channel('OnChat', function ($user) {
  if(JWTAuth::check()){
    return $user;
  }
});

via Chebli Mohamed