yii2-app-basic/app/config/web/components.php

<?php
/**
 * Created by PhpStorm.
 * User: slava
 * Date: 13.05.17
 * Time: 17:01
 */

return [
    'request' => [
        // !!! insert a secret key in the following (if it is empty) - this is required by cookie validation
        'cookieValidationKey' => 'cqnasKuLkltNc9Ma2pGZduPzYBfVFOei',
    ],
    'cache' => [
        'class' => 'yii\caching\FileCache',
    ],
    'user' => [
            'identityClass' => 'app\models\dektriumuser\User',
            'enableAutoLogin' => true,
    ],
    'errorHandler' => [
        'errorAction' => 'site/error',
    ],
    'mailer' => require(__DIR__ . '/../mailer.php'),
    'log' => [
        'traceLevel' => YII_DEBUG ? 3 : 0,
        'targets' => [
            [
                'class' => 'yii\log\FileTarget',
                'levels' => ['error', 'warning'],
            ],
        ],
    ],
    'db' => require(__DIR__ . '/../db.php'),
    'urlManager' => [
        'enablePrettyUrl' => true,
        'showScriptName' => false,
        'rules' => [
            '<controller:\w+>/<action:\w+>/<id:\d+>' => '<controller>/<action>',
        ],
    ],
    'view' => [
        'theme' => [
            'pathMap' => [
                '@dektrium/user/views' => '@app/views/dektriumuser',
                '@dektrium/user/views/mail' => '@app/views/dektriumuser/mail',
            ],
        ],
    ],
];