Creating User Database

// app.js
var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

const mongoose = require('mongoose');
const vdict = require('./config');
const databaseAccess = vdict.databaseAccess;
mongoose.connect(databaseAccess, {useNewUrlParser: true, useUnifiedTopology: true});

process.env.TZ = "Asia/Phnom_Penh";

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter);
app.use('/users', usersRouter);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});

// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});

module.exports = app;

// routes/users.js
const express = require('express');
const vdict = require('../config');
const router = express.Router();
const usersdb = require('../models/usersdb')

router.get('/', function(req, res, next) {
  res.render('login', vdict);
});

module.exports = router;

// models/usersdb.js
class Usersdb{
  constructor(){
    const mongoose = require('mongoose');

    const usersSchema = new mongoose.Schema({
      name: {type: String, required: true},
      email: {type: String, required: true},
      role: {type: String, required: true}
    });

    const users = mongoose.model('users', usersSchema);
    this.users = users;

    users.findOne(function (err, user){
      if (err) return console.error(err);
      if(!user){
        const root = new users({name:'root', email:'root@multimedia.com', role:'Admin'});
        root.save(function (err, root){
          if (err) return console.error(err);
        });
      }
    });
  }

}//end class

const usersdb = new Usersdb();

module.exports = usersdb;

GitHub: "https://github.com/Sokhavuth/multimedia
Heroku: https://khmerweb-multimedia.herokuapp.com/