如何在条件中间件中使用Node.js Express-session？

var express = require('express')
var parseurl = require('parseurl')
var session = require('express-session')

var app = express()


app.use(session({
  secret: 'keyboard cat',
  resave: false,
  saveUninitialized: true
}))
var express = require('express')
var parseurl =