autologin.js

const request = require("request-promise")
const cheerio = require("cheerio");

async function login(username, password) {
  console.log("Loggin in...")
  const body = await request("https://ungdomsboligaarhus.dk/user");

  const $ = cheerio.load(body);
  const form_build_id = $(`input[name="form_build_id"]`).val();

  const formData = {
    form_build_id,
    form_id: "user_login",
    name: username,
    op: "Log+ind",
    pass: password
  }
  
  const res = await request.post({ url: "https://ungdomsboligaarhus.dk/user", formData, resolveWithFullResponse: true, simple: false });
  console.log("Response", res.statusCode, res.statusMessage)
}

login("<username>", "<password>")