users.js

const express = require('express');
const userRoute = express.Router();
const cors = require('cors');
const bodyParser = require('body-parser');
const jwt = require('jsonwebtoken');
const saltRounds = 15;
const bcrypt = require('bcrypt');
const users = require('../models').users;
userRoute.use(function timeLog (req, res, next) {
    console.log('Time: ', Date.now());
    next();
});

userRoute.use(cors());
userRoute.use(bodyParser.json());
userRoute.use(bodyParser.urlencoded({ extended: true}));

userRoute.post('/register', (req, res) => {
    users.findAll({
        attributes: ['username'],
        where: {
            username: req.body.username
        }
    }).then((data) => {
        if(data == '') {
            bcrypt.hash(req.body.password, saltRounds, (err, hash) => {
                if(err != undefined) {
                    console.log(err);
                    res.status(400).send("There was an issue while creating the user. Please see try again or consult with a system administrator");
                } else {
                    users.create({
                        username: req.body.username,
                        password: hash
                    }).then((err, data) => {
                        if(data != '') {
                            res.send("User successfully created");
                        } else {
                            console.log(err);
                            res.status(400).send("There was an issue while creating your username. Please try again.");
                        }
                    })
                }
            });
        } else {
            console.log("Username already exists");
            res.status(400).send("Username already exists. Please try again.");
        }
    });
});

module.exports = userRoute;