Storing and using session info

 const session = require("express-session");

const sessionOptions = session({

  secret: "secretstring",

  resave: false,

  saveUninitialized: true,

});

app.use(sessionOptions);

app.get("/register", (req, res) => {

  let { name = "anonymous" } = req.query;

  req.session.name = name;

  res.redirect("/hello");

});

app.get("/hello", (req, res) => {

  res.send(`hello!${req.session.name}`);

});