app.js

const express = require('express'),
  bodyParser = require('body-parser'),
  mongoose = require('mongoose'),
  initializeOauth = require('./middleware/authServer'),
  authenticateRequest = require('./middleware/authenticator');

var app = express();

const authenticationRoutes = require('./routes/oauth');

app.use(bodyParser.urlencoded({ extended: true }));

app.use(bodyParser.json());

app.oauth = initializeOauth;

app.use(authenticationRoutes);

app.get('/', authenticateRequest, function(req, res) {
  res.send('Secret area');
});

mongoose
  .connect(process.env.DATABASE, {
    useCreateIndex: true,
    useNewUrlParser: true
  })
  .then(result => {
    // console.log(result)
    console.log('connected');
    app.listen(process.env.PORT || 3000);
  })
  .catch(err => console.log('error', err));