Autentication example

behaviorsYii2.php

<?php
public function behaviors()
{
    return [
        'access' => [
            'class' => AccessControl::className(),
            'rules' => [
                array( // Logged users (Admin & Capturista)
                    'actions' => [
                        'index',
                        'view',
                        'create', 
                        'update',
                        'validateajax',
                    ],
                    'allow' => (
                        !Yii::$app->user->isGuest
                    )
                ),
                array( // Admin user only
                    'actions' => [
                        'delete'
                    ],
                    'allow' => (
                        !Yii::$app->user->isGuest &&
                        Yii::$app->user->identity->isAdmin()
                    )
                ),
            ]
        ],
        'verbs' => [
            'class' => VerbFilter::className(),
            'actions' => [
                'delete' => ['post'],
            ],
        ],
    ];
}