ACL - Implement acl together with passport

I am trying out node_acl with passport-local. When I run my code I cannot secure the route for the admin-user '/admin' and I am redirected to the /login page.

Find below my minimum runnable example:

require('dotenv').config()
const express = require('express')
// const fs = require('fs')
const path = require('path')
const logger = require('morgan')
const bodyParser = require('body-parser')
const cookieParser = require('cookie-parser')
const session = require('express-session')
const passport = require('passport')
const LocalStrategy = require('passport-local').Strategy
const ACL = require('acl')

// load user.json file
// const d = fs.readFileSync(path.join(__dirname, '/../data/user.json'))
// const userObj = JSON.parse(d)
const userObj = [{
  id: 1,
  username: 'admin',
  password: 'admin',
  email: 'admin@admin.com',
  role: 'admin',
},
{
  id: 2,
  username: 'user',
  password: 'user',
  email: 'user@user.com',
  role: 'user',
},
]

const app = express()

// view engine setup
app.set('views', path.join(__dirname, 'views'))
app.set('view engine', 'pug')
app.use(logger(process.env.LOG_ENV))
app.use(bodyParser.json())
app.use(bodyParser.urlencoded({
  extended: false,
}))
app.use(express.static(path.join(__dirname, '/../public')))
app.use(cookieParser())

app.use(session({
  secret: 'super-mega-hyper-secret',
  resave: false,
  saveUninitialized: false,
}))

/**
 * Passport Local
 */
app.use(passport.initialize())
app.use(passport.session())

function authenticate() {
  passport.serializeUser((user, done) => {
    done(null, user.id)
  })

  passport.deserializeUser(async(id, done) => {
    //        const user = await serviceAuth.findById(id)
    const user = userObj.find(item => item.id === id)
    done(null, user)
  })

  // Sign in with username and Password
  passport.use('local', new LocalStrategy({
    usernameField: 'username',
  }, async(username, password, done) => {
    const user = userObj.find(item => item.username === username)
    done(null, user)
  }))
}

const isAuthenticated = (req, res, next) => {
  if (req.isAuthenticated()) {
    res.locals.user = req.session.user
    return next()
  }
  res.redirect('login')
}
authenticate()

/**
 * Node ACL
 */

function accessControl() {
  const nodeAcl = new ACL(new ACL.memoryBackend())

  nodeAcl.allow([{
    roles: 'admin',
    allows: [{
      resources: '/admin',
      permissions: '*',
    }],
  }, {
    roles: 'user',
    allows: [{
      resources: '/dashboard',
      permissions: 'get',
    }],
  }, {
    roles: 'guest',
    allows: [],
  }])

  // Inherit roles
  //  Every user is allowed to do what guests do
  //  Every admin is allowed to do what users do
  nodeAcl.addRoleParents('user', 'guest')
  nodeAcl.addRoleParents('admin', 'user')

  nodeAcl.addUserRoles(1, 'admin')
  nodeAcl.addUserRoles(2, 'user')
  nodeAcl.addUserRoles(0, 'guest')

  return nodeAcl
}

/*
function checkPermission(resource, action) {
  const access = accessControl()

  return (req, res, next) => {
    const uid = req.session.user.id
    access.isAllowed(uid, resource, action, (err, result) => {
      if (result) {
        next()
      } else {
        const checkError = new Error('User does not have permission to perform this action on this resource')
        next(checkError)
      }
    })
  }
} */

const getCurrentUserId = (req) => {
  console.log(req)
  req.user && req.user.id.toString() || false
}

const access = accessControl()

// Routes
app.get('/login', (req, res) => {
  res.render('login')
})

app.post('/login', (req, res, next) => {
  passport.authenticate('local', (err, user) => {
    if (err) return next(err)
    if (!user) {
      return res.status(401).json({
        error: 'Email or password is incorrect.',
      })
    }

    return res.render('dashboard')
  })(req, res, next)
})

app.get('/dashboard', [isAuthenticated, access.middleware()], (req, res) => {
  res.render('dashboard')
})

app.get('/admin', [isAuthenticated, access.middleware()], (req, res) => {
  res.render('admin')
})

app.get('/status', (request, response) => {
  access.userRoles(getCurrentUserId(request), (error, roles) => {
    response.send(`User: ${JSON.stringify(request.user)} Roles: ${JSON.stringify(roles)}`)
  })
})

// Start Server
const port = process.env.APP_PORT || 8080
const host = process.env.APP_URL || 'localhost'

app.listen(port, host, () => {
  console.log(`Listening on ${host}:${port}`)
})

module.exports = app

Any suggestions why the route, /admin cannot be called only be the admin user?

Thank you in advance for your replies!