Listen switch_user Event in #Symfony

#config.yml 
services: 
  myproject.security_switch_user: 
    class: MyApp\AppBundle\Listener\SecuritySwitchUserListener 
    tags: 
      - { 
         name: kernel.event_listener, 
         event: security.switch_user, 
         method: onSecuritySwitchUser }



<?php


// src/MyApp/AppBundle/Listener/SecuritySwitchUserListener.php

namespace MyApp\AppBundle\Listener;

use Symfony\Component\Security\Http\Event\SwitchUserEvent;

class SecuritySwitchUserListener

{

  public function onSecuritySwitchUser(SwitchUserEvent $event)

  {

    $newUser = $event->getTargetUser();

  }
}