Module.php

<?php

namespace dimple\administrator;

use Yii;
use yii\i18n\PhpMessageSource;


class Module extends \yii\base\Module
{
    public $controllerNamespace = 'dimple\administrator\controllers';

    const VERSION = '0.5.0';

    /** Email is changed right after user enter's new email address. */
    const STRATEGY_INSECURE = 0;

    /** Email is changed after user clicks confirmation link sent to his new email address. */
    const STRATEGY_DEFAULT = 1;

    /** Email is changed after user clicks both confirmation links sent to his old and new email addresses. */
    const STRATEGY_SECURE = 2;

    /** @var bool Whether to enable registration. */
    public $enableRegistration = true;

    /** @var bool Whether to remove password field from registration form. */
    public $enableGeneratingPassword = false;

    /** @var bool Whether user has to confirm his account. */
    public $enableConfirmation = true;

    /** @var bool Whether to allow logging in without confirmation. */
    public $enableUnconfirmedLogin = false;

    /** @var bool Whether to enable password recovery. */
    public $enablePasswordRecovery = true;

    /** @var integer Email changing strategy. */
    public $emailChangeStrategy = self::STRATEGY_DEFAULT;

    /** @var int The time you want the user will be remembered without asking for credentials. */
    public $rememberFor = 1209600; // two weeks

    /** @var int The time before a confirmation token becomes invalid. */
    public $confirmWithin = 86400; // 24 hours

    /** @var int The time before a recovery token becomes invalid. */
    public $recoverWithin = 21600; // 6 hours

    /** @var int Cost parameter used by the Blowfish hash algorithm. */
    public $cost = 10;

    /** @var array An array of administrator's usernames. */
    public $admins = [];

    /** @var array Mailer configuration */
    public $mailer = [];

    /** @var array Model map */
    public $modelMap = [];

    public $confirmUrl;
    public $recoveryUrl;

    public $layout = 'main';

    /**
     * @var string The prefix for user module URL.
     * @See [[GroupUrlRule::prefix]]
     */
    public $urlPrefix = 'administrator';

    public function init()
    {
        parent::init();

        Yii::configure($this, require(__DIR__ . '/config.php'));
        $this->registerTranslations();
        $this->setDefaultMessageMailer();

        $this->modules = [
            // 'admin' => [
            //     // you should consider using a shorter namespace here!
            //     'class' => 'app\modules\forum\modules\admin\Module',
            // ],
        ];

    }

    public function registerTranslations()
    {    
        if(!isset(Yii::$app->i18n->translations['user*'])) {
            Yii::$app->i18n->translations['user*'] = [
            'class' => 'yii\i18n\PhpMessageSource',
            'basePath' => __DIR__ . '/messages'
            ];
        }
    }

    public function setDefaultMessageMailer(){
                $defaults = [
                'welcomeSubject'        => \Yii::t('user', 'Welcome to {0}', \Yii::$app->name),
                'confirmationSubject'   => \Yii::t('user', 'Confirm account on {0}', \Yii::$app->name),
                'reconfirmationSubject' => \Yii::t('user', 'Confirm email change on {0}', \Yii::$app->name),
                'recoverySubject'       => \Yii::t('user', 'Complete password reset on {0}', \Yii::$app->name)
            ];

        Yii::$container->set('dimple\administrator\Mailer', array_merge($defaults, $this->mailer));
    }

}