added login , update scan, added user

socket.js

@@ -0,0 +1,29 @@
+const socketio = require('socket.io');
+const socketio_client = require('socket.io-client');
+const dotenv = require('dotenv');
+
+dotenv.config();
+
+const socket_client = socketio_client("http://localhost:"+process.env.PORT);
+
+let io;
+
+function init(server) {
+  io = socketio(server);
+  return io;
+}
+
+function getIO() {
+  if (!io) {
+    throw new Error('Socket.io not initialized');
+  }
+  return io;
+}
+
+
+
+module.exports = {
+  init,
+  getIO,
+  socket_client
+};