/**
* Método para cargar usuarios de prueba
*/
private function loadUsers(ObjectManager $manager, $username, $email, $password, $roles)
{
$date = new \DateTime(date('Y-m-d H:i:s'));
$user = new Users();
$user->setSalt(md5(uniqid(null, true)));
$encoder = $this->container->get('security.password_encoder');
$pass = $encoder->encodePassword($password, $user->getSalt());
$user->setUsername($username);
$user->setEmail($email);
$user->setPassword($pass);
$user->setActive(1);
$user->setRoles($roles);
$user->setCreatedAt($date);
$user->setModifiedAt($date);
$user->setCreatedBy(1);
$manager->persist($user);
unset($user);
$manager->flush();
}