private room but socketio not ready

backend/service-privateroom/server.js

@@ -0,0 +1,68 @@
+const express = require('express');
+const app = express();
+const port = process.env.PORT || 3002;
+const http = require('http');
+const { Server } = require("socket.io");
+const server = http.createServer(app);
+const io = new Server(server, {
+    cors: {
+        origin: "http://127.0.0.1:4200",
+        methods: ["GET", "POST"],
+        credentials: true
+    }
+});
+
+const cookieParser = require('cookie-parser');
+app.use(cookieParser());
+
+const bodyParser = require('body-parser');
+app.use(bodyParser.urlencoded({extended:true}));
+app.use(bodyParser.json());
+
+const cors = require('cors');
+app.use(cors({origin: 'http://127.0.0.1:4200', credentials: true}));
+
+const mongoose = require("mongoose");
+const conversationRoute = require("./routes/conversations");
+const messageRoute = require("./routes/messages");
+const router = express.Router();
+const path = require("path");
+const config = require("./config");
+
+const Conversations = require("../service-privateroom/models/Conversation");
+const url = config.mongodbHost+config.mongodbDatabase;
+
+mongoose.connect(url,({useNewUrlParser: true, useUnifiedTopology: true})).then( function(){
+    console.log('mongodb-privated-room connected '+mongoose.connection.readyState);
+}).catch(function(err){
+    console.log('error : '+err);
+});
+
+
+app.use("/conversations", conversationRoute);
+app.use("/messages", messageRoute);
+
+io.on('connection',socket => {
+
+    let users = {};
+
+    auth.getSession(socket.request, function(res){
+        const getUsername = auth.getUsername(res);
+        if (getUsername === -1) {
+            socket.send('error','not authenticated');
+        }
+        else{
+            console.log(`${getUsername} joined the chat.`);
+
+            //TODO apply conversations and messages
+
+            socket.on("disconnect", function() {
+                console.log(`${getUsername} left the chat.`);
+            });
+        }
+    });
+});
+
+server.listen(port, () => {
+    console.log(`listening on *:${port}/`);
+});