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

const passport = require('passport')

exports.onlyAuthUser = function (req, res, next) {
  if (req.isAuthenticated()) {
    return next()
  }

  return res.status(401).send({errors: {auth: 'Not Authenticated!'}})
}

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

  if (user && user['role'] === 'admin') {
    return next()
  }

  return res.status(401).send({errors: {auth: 'Not Authorized!'}})
}