User bundle login action. Where will the redirect goes in ADR .

LoginAction.php

<?php
namespace Hari\User_Bundle\Action;

use Aura\Web\Request;
use Hari\User_Bundle\Input\LoginForm;
use Hari\User_Bundle\Responder\LoginResponder;
use Aura\Auth\Adapter\AbstractInterface as AuthAdapter;
use Aura\Auth\User;

class LoginAction extends AbstractUserAction
{
    /**
     *
     * @param Request $request
     * @param LoginResponder $responder
     * @param LoginForm $form
     * @param User $user
     * @param Authadapter $auth_adapter
     */
    public function __construct(
        Request $request,
        LoginResponder $responder,
        LoginForm $form,
        User $user,
        AuthAdapter $auth_adapter
    ) {
        $this->request   = $request;
        $this->responder = $responder;
        $this->form = $form;
        $this->user = $user;
        $this->auth_adapter = $auth_adapter;
    }

    public function __invoke()
    {
        if ($this->user->isValid()) {
            // redirect
        }
        if ($this->request->method->isPost()) {
            $cred = array(
                'username' => $this->request->post->get('username'),
                'password' => $this->request->post->get('password')
            );
            $this->form->fill($cred);
            if ($this->form->filter()) {
                $this->auth_adapter->login($this->user, $cred);
            }
        }
        return $this->response();
    }
}