[api][messages routes] remove mongoose & send user instead of his id

api/routes/messages_routes.js

 import express from 'express';
-import mongoose from "mongoose";
 const router = express.Router();
 
 import Room from "../models/Room.js";
@@ -35,7 +34,7 @@ router.post('/', validator.body(messageSchema), async function(req, res, next){
 
     const newMessage = new Message({
         body: req.body.body,
-        author : author._id,
+        author: author,
         room: room._id,
         date: new Date()
     });
@@ -46,10 +45,6 @@ router.post('/', validator.body(messageSchema), async function(req, res, next){
         return next(err);
     }
     
-    // websockets.forEach(function (otherWS) {
-    //     otherWS.send(JSON.stringify(msg))
-    // });
-
     res.json(newMessage);
     
 })