nuxt-promote-yourself/server/controllers/user.js

const User = require('../models/user');
const passport = require('passport');

exports.getCurrentUser = function (req, res, next) {
  const user = req.user;

  if(!user) {
    return res.sendStatus(422);
  }

  return res.json(user);
};

exports.register = function(req, res) {
  const registerData = req.body

  if (!registerData.email) {
    return res.status(422).json({
      errors: {
        email: 'is required',
        message: 'Email is required'
      }
    })
  }

  if (!registerData.password) {
    return res.status(422).json({
      errors: {
        password: 'is required',
        message: 'Password is required'
      }
    })
  }

  if (registerData.password !== registerData.passwordConfirmation) {
    return res.status(422).json({
      errors: {
        password: 'is not the same as confirmation password',
        message: 'Password is not the same as confirmation password'
      }
    })
  }

  const user = new User(registerData);

  return user.save((errors, savedUser) => {
    if (errors) {
      return res.status(422).json({errors})
    }

    return res.json(savedUser)
  })
}

exports.login = function (req, res, next) {
  const { email, password } = req.body

  if (!email) {
    return res.status(422).json({
      errors: {
        email: 'is required',
        message: 'Email is required'
      }
    })
  }

  if (!password) {
    return res.status(422).json({
      errors: {
        password: 'is required',
        message: 'Password is required'
      }
    })
  }

  return passport.authenticate('local', (err, passportUser) => {
    if (err) {
      return next(err)
    }

    if (passportUser) {
      req.login(passportUser, function (err) {
        if (err) { next(err); }

        return res.json(passportUser)
      });
    } else {
      return res.status(422).send({errors: {
        'message': 'Invalid password or email'
      }})
    }

  })(req, res, next)
}

exports.logout = function (req, res) {
  req.logout()
  return res.json({status: 'Session destroyed!'})
}