React App with Express Backend & express-session
Your axios request from your React client needs to be sent withCredentials. To fix it, either do axios.defaults.withCredentials = true; or do axios.get('url', {withCredentials: true})...Also in your expressjs backend, set cors options credentials: true
Here is an example of setting up express-session using connect-redis. First, setup both express-session and the Redis store.
var session = require('express-session);var RedisStore = require('connect-redis')(session); Then, where you're declaring middleware for your app;
app.use(session({ store: new RedisStore({ url: process.env.REDIS_URL }), secret: process.env.REDISSECRET, resave: false, saveUninitialized: false}));now when you use req.session.{etc} this writes to your Redis DB.