Node login codeshelper, login successful, but there is a sf_remember parameter can not find the source? - Codes Helper

recently, I learned node crawler. I wanted to practice the data crawler that requires login, so I used codeshelper to practice my hands. I have successfully solved the problem of random query and cookie Synchronize for every login request, and then directly used superagent to request this API: the related code is as follows:

const superagent = require("superagent")
const async = require("async")
const getRandom = require("./getRandom")
let random = ""
let cookie = ""
async.series([
  (cb) => {
    superagent
      .get("https://segmentfault.com")
      .end((err, res) => {
        if (err) console.log(err)
        cookie = res.headers["set-cookie"].join(",").match(/(PHPSESSID=.+?);/)[1]
        // console.log(cookie)
        random = getRandom.getToken(res.text)
        // console.log(res)
        cb(null)
      })
  },
  (cb) => {
    const username = process.argv[2]
    const password = process.argv[3]
    console.log(cookie)
    console.log(random)
    let header = {
      "accept": "*/*",
      "accept-encoding": "gzip, deflate, br",
      "accept-language": "zh-CN,zh;q=0.9",
      "content-length": "47",
      "content-type": "application/x-www-form-urlencoded; charset=UTF-8",
      "cookie": `PHPSESSID=${cookie};`,
      "origin": "https://segmentfault.com",
      "referer": "https://segmentfault.com/",
      "user-agent": "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36",
      "x-requested-with": "XMLHttpRequest"
    }
    superagent
      .post(`https://segmentfault.com/api/user/login`)
      .query({"_": random})
      .set("Referer", "https://segmentfault.com/user/login")
      .set("X-Requested-With", "XMLHttpRequest")
      .set(header)
      .type("form")
      .send({
        username: username,
        password: password,
        remember: 1
      })
      .end(function(err, res) {
        if (err) {
          console.log(err.status);
        } else {
          console.log("yay got " +  res.status)
          cb(null, cookie)
        }
        })
  }
])

you can log in successfully by executing node index phoneNumber password directly. If you continue to crawl other interfaces, you will return to not found, for help