App\Commands\AppController::actionSetupAdminUser PHP Method

    public function actionSetupAdminUser()
    {
        $finder = \Yii::$container->get(Finder::className());
        $admin = $finder->findUserByUsername('admin');
        if ($admin === null) {
            $email = $this->prompt('E-Mail for application admin user:', ['default' => getenv('APP_ADMIN_EMAIL')]);
            $this->action('user/create', [$email, 'admin']);
            $password = $this->prompt('Password for application admin user:', ['default' => getenv('APP_ADMIN_PASSWORD')]);
        } else {
            $password = $this->prompt('Update password for application admin user (leave empty to skip):');
        }
        if ($password) {
            $this->action('user/password', ['admin', $password]);
        }
        sleep(1);
        // confirmation may not succeed without a short pause
        $this->action('user/confirm', ['admin']);
    }