app.use("/login", function (req, res, next) {
    console.log(req.url) 
    next()
})
app.get("/login", function (req, res, next) {
    console.log(req.url)
}) enter  http://127.0.0.1:3000/login why the result is 
 / 
 / login 
 Why is it inconsistent 
