can't get express session data from socket io connection - node.js

Question

Hello i'm having a problem to access express session data like I did on http connection.
Even when I copy the documentation edited by socket io on this link
https://socket.io/how-to/use-with-express-session#1st-use-case-socketio-only-retrieves-the-session-context i still can't access express session data.
there is my server
const express = require('express');
const app = express();
const cors = require('cors');
const helmet = require('helmet');
const sessionStrategy = require('#middlewares/session_strategy/sessionStrategy');
const httpServer = require("http").Server(app);
const Server = require("socket.io").Server;
app.use(express.urlencoded({
parameterLimit: 20,
extended: true,
limit: '10mb'
}));
app.use(express.json({limit: '100mb'}));
// CORS
app.use(cors({
origin: true,
credentials: true
}));
app.use(sessionStrategy);
if (process.env.NODE_ENV === 'production') {
app.set('trust proxy', 1);
}
const corsConfig = {
origin: true,
credentials: true,
methods: ["GET", "POST"]
};
const io = new Server(httpServer, {cors: corsConfig});
const wrap = middleware => (socket, next) => middleware(socket.request, {}, next);
io.use(wrap(sessionStrategy));
io.on("connection", (socket) => {
// socket.request.session give undefined value
console.log("Connexion", socket.request.session);
socket.on("event_test", (data) => {
console.log(data);
console.log(socket);
});
socket.on("connect_error", (err) => {
console.log(`connect_error due to ${err.message}`);
});
});
app.all('*', require("#middlewares/catchAllRoute"));
httpServer.listen(process.env.NODE_API_PORT, function () {
console.log('App listening on port ' + process.env.NODE_API_PORT + ' ...');
});
and there is my client
import { io } from "socket.io-client";
const socket = io("http://localhost:9000", {
withCredentials: true
});
export default socket;
import socket_connection from "#/sockets_connections";
// the command is launched after a click
socket_connection.emit("event_test", {"test":"test"});