Javascript 如何在中间件上更改此GET/user端点，以便向每个GET端点发送通知？

/*此代码放置在中间件上的user.ts路由中。如何在中间件上更改此GET/user端点，以便向每个GET端点发送通知*/

   const UserRouter = router.get(
      '/',
      passport.session(),
      checkSession,
      async (req: Request, res: Response, next: NextFunction) => {
        try {
          // @ts-ignore
          const email : string = req.user ? req.user.email : ''
    
          const user = await User.findOne({ email }, frontendUser).populate({ path: 'offers', select: '-_id -__v', match: { status: { $nin: ['closed', 'deleted'] } } })
          if (!user) sendError(res, 'BAD_REQUEST')
    
          res.send(user)
        } catch (err) {
          handleError(err)
          sendError(res, 'INTERNAL_SERVER_ERROR')
        }
      }
    )