code: 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']);
      }
docs: Disconnects a network account from user.
  @param  integer $id
  @return \yii\web\Response
  @throws \yii\web\NotFoundHttpException
  @throws \yii\web\ForbiddenHttpException