Let's imagine a website with the following source code:
const express = require('express');
const cookieParser = require('cookie-parser');
const cookieEncrypter = require('cookie-encrypter');
const app = express();
app.use(cookieParser("NicePasswordHereItIsAGoodSecret!"));
app.use(cookieEncrypter("NicePasswordHereItIsAGoodSecret!"));