AuthenticationController.js

const {User}= require('../models')
const jwt = require('jsonwebtoken')
const config = require('../config/config')

function jwtSignUser (user) {
    const ONE_WEEK = 60 * 60 * 24 *7
    return jwt.sign(user, config.authentication.jwtSecret, {
        expiresIn: ONE_WEEK
    })
}

module.exports={
    async register(req, res){

      try{
        const user= await User.create(req.body)
        const userJson = user.toJSON()
        res.send({
            user: userJSON,
            token: jwtSignUser(userJson)
        })
      } catch (err){
         res.status(400).send({
            error: 'This email account is already in use.'
         })
        }
    },
    async login(req, res) {
        try{
            const {email, password} = req.body
            const user= await User.findOne({
                where: {
                    email: email
                }
            })
            if (!user) {
                return res.status(403).send({
                    error: 'The login information was incorrect'
                })
            }
            const isPasswordValid = await user.comparePassword(password)
            if(!isPasswordValid) {
                return res.status(403).send({
                    error: 'The login information was incorrect'
                })
            }
            const userJson = user.toJSON()
            res.send({
                user: userJSON,
                token: jwtSignUser(userJson)
            })
        }catch (err){
            res.status(500).send({
                error: 'An error has occured trying to log in'
            })
        }
    }
}