mock_server.js

const express = require('express')
const bodyParser = require('body-parser')
const jwt = require('jsonwebtoken')
const mongoose = require('mongoose')
const User = require('./models/user')

mongoose.Promise = global.Promise
mongoose.connect('mongodb://localhost/mock_server', { useMongoClient: true });

const app = express()

app.set('port', 8080)
app.set('secret', 'oh1234354epoiuhunaslkjfnaslkfjnlaskjdfn')

app.get('/', (req, res) => {
  res.send('it works')
})

const api = express.Router()
api.post('/login', (req, res) => {
	User.findOne({email: req.body.email}, (err, user) => {
		if (err)
			throw err
		if (!user)
			return res.status(403).send({success: false, message: 'user not found'})
		const payload = {admin: user.admin, _id: user._id}
		const token = jwt.sign(payload, app.get('secret'), {expiresIn: '1 day'})
		return res.json({success: true, token: token})
	})
})
api.post('/users', (req, res) => {
	const user = new User({email: req.body.email, password: req.body.password, admin: false})
	user.save(err => {
		if (err)
			throw err
		res.json({success: true})
	})
})
api.use((req, res, next) => {
	const token = req.body.token || req.query.token || req.headers['x-access-token']
	if (token) {
		jwt.verify(token, app.get('secret'), (err, decoded) => {
			if (err) {
				return res.status(403).send({success: false, message: 'invalid token'})
			}
			req.decoded = decoded
			next()
		})
	} else {
		return res.status(403).send({success: false, message: 'missing token'})
	}
})
api.get('/users', (req, res) => {
	User.find({}, (err, users) => {
		res.json(users);
	})
})

app.use(bodyParser.urlencoded({extended: false}))
app.use(bodyParser.json())
app.use(require('morgan')('dev'))
app.use('/api', api)

app.listen(app.get('port'))
console.log('listening...')

{
  "name": "mock_server",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.18.2",
    "express": "^4.16.2",
    "jsonwebtoken": "^8.1.0",
    "mongoose": "^4.12.3",
    "morgan": "^1.9.0"
  }
}