Stuck in Guide to implement RBAC

Hi,

im new to yii and programming (oop). Please help me, i stuck on this step http://www.yiiframework.com/doc-2.0/guide-security-authorization.html#generating-rbac-data

what is this guide want me to do?

If your permissions hierarchy doesn’t change at all and you have a fixed number of users you can create a console command that will initialize authorization data once via APIs offered by authManager:


<?php

namespace app\commands;


use Yii;

use yii\console\Controller;


class RbacController extends Controller

{

    public function actionInit()

    {

        $auth = Yii::$app->authManager;


        // add "createPost" permission

        $createPost = $auth->createPermission('createPost');

        $createPost->description = 'Create a post';

        $auth->add($createPost);


        // add "updatePost" permission

        $updatePost = $auth->createPermission('updatePost');

        $updatePost->description = 'Update post';

        $auth->add($updatePost);


        // add "author" role and give this role the "createPost" permission

        $author = $auth->createRole('author');

        $auth->add($author);

        $auth->addChild($author, $createPost);


        // add "admin" role and give this role the "updatePost" permission

        // as well as the permissions of the "author" role

        $admin = $auth->createRole('admin');

        $auth->add($admin);

        $auth->addChild($admin, $updatePost);

        $auth->addChild($admin, $author);


        // Assign roles to users. 1 and 2 are IDs returned by IdentityInterface::getId()

        // usually implemented in your User model.

        $auth->assign($author, 2);

        $auth->assign($admin, 1);

    }

}

thanks for help.

Exactly what it states. What’s not working?