Express res.send

Once res.send() is used 
no further operations are sent
console.log can be used multiple times but res.send can only be used once 

const express = require("express");

const users = require("./MOCK_DATA.json");

const app = express();
const PORT = 3000;

app.use(
  "/hi/:id",
  (req, res, next) => {
    console.log("HELLO ");
    next();
  },
  (req, res, next) => {
    console.log("Hellow 2");
    next();
  }
);

app.get("/hi/:id", (req, res, next) => {
  res.send(req.params.id);
});
app.listen(PORT, () => {
  console.log("server is running at port" + PORT);
});

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