public function actionCreateTestUsers()
    {
        $manager = new User();
        $manager->username = 'Manager';
        $manager->first_name = 'Manager';
        $manager->last_name = 'Manager';
        $manager->email = 'manager@gmail.com';
        $manager->department_id = 1;
        $manager->country_id = 1;
        $manager->region_id = 1;
        $manager->lang_id = 1;
        $manager->setPassword('manager');
        $manager->generateAuthKey();
        $manager->save(false);

        // the following three lines were added:
        $auth = \Yii::$app->authManager;
        $authorRole = $auth->getRole('manager');
        $auth->assign($authorRole, $manager->getId());

        $buddy = new User();
        $buddy->username = 'Buddy';
        $buddy->first_name = 'Buddy';
        $buddy->last_name = 'Buddy';
        $buddy->email = 'buddy@gmail.com';
        $buddy->department_id = 1;
        $buddy->country_id = 1;
        $buddy->region_id = 1;
        $buddy->lang_id = 1;
        $buddy->setPassword('buddy');
        $buddy->generateAuthKey();
        $buddy->save(false);

        // the following three lines were added:
        $auth = \Yii::$app->authManager;
        $authorRole = $auth->getRole('buddy');
        $auth->assign($authorRole, $buddy->getId());


        $speaker = new User();
        $speaker->username = 'Speaker';
        $speaker->first_name = 'Speaker';
        $speaker->last_name = 'Speaker';
        $speaker->email = 'speaker@gmail.com';
        $speaker->department_id = 1;
        $speaker->country_id = 1;
        $speaker->region_id = 1;
        $speaker->lang_id = 1;
        $speaker->setPassword('speaker');
        $speaker->generateAuthKey();
        $speaker->save(false);

        // the following three lines were added:
        $auth = \Yii::$app->authManager;
        $authorRole = $auth->getRole('speaker');
        $auth->assign($authorRole, $speaker->getId());
    }