public function actionDisconnect($id)
    {
        $account = $this->finder->findAccountById($id);
        if ($account === null) {
            throw new NotFoundHttpException;
        }
        if ($account->user_id != \Yii::$app->user->id) {
            throw new ForbiddenHttpException;
        }
        $account->delete();

        return $this->redirect(['networks']);
    }