User decoder

jwt_user.js

const server = {}; // ...
const cookieParser = require('cookie-parser');
const jwt = require('jsonwebtoken');

server.express.use(cookieParser());
server.express.use((req, res, next) => {
  const { token } = req.cookies;
  if (token) {
    const { userId } = jwt.verify(token, process.env.APP_JWT_SECRET);
    req.userId = userId;
  }
  next();
});