Singly Passport Express Authentication with Mongoose/Mongodb Integration - this is my new passport.js file, along with my User model for Mongoose, and the 2 routes I use with this system.

singly-mongoose.js

// db.js (just the User model)

var UserSchema = new Schema({
 // _id: String,
  username: String,
  name: String,
  gravatar: String,
  email: String,
  provider: String,
  services: String,
  singlyId: String,
  hashed_password: String,
  salt: String,
  singly: {}

})

// passport.js (the whole file)

var mongoose = require('mongoose')
  , LocalStrategy = require('passport-local').Strategy
  , SinglyStrategy = require('passport-singly').Strategy
  , User = mongoose.model('User')

module.exports = function (passport, config) {
  // require('./initializer')

passport.serializeUser(function(user, done) {
    console.log('serializeUser: ' + user._id)
    done(null, user._id);
});

passport.deserializeUser(function(id, done) {
    User.findById(id, function(err, user){
        console.log(user)
        if(!err) done(null, user);
        else done(err, null)  
    })
});

  // use local strategy
  passport.use(new LocalStrategy({
      usernameField: 'email',
      passwordField: 'password'
    },
    function(email, password, done) {
      User.findOne({ email: email }, function (err, user) {
        if (err) { return done(err) }
        if (!user) {
          return done(null, false, { message: 'Unknown user' })
        }
        if (!user.authenticate(password)) {
          return done(null, false, { message: 'Invalid password' })
        }
        return done(null, user)
      })
    }
  ))
// use singly strategy

passport.use(new SinglyStrategy({
    clientID: config.singly.clientID,
    clientSecret: config.singly.clientSecret,
    callbackURL: config.singly.callbackURL
  },
  function(accessToken, refreshToken, profile, done) {
      User.findOne({ 'singly.id': profile._id}, function (err, user) {
        if (err) { return done(err) }
        if (!user) {
          user = new User({
              name: JSON.parse(profile._raw).name
            , email: JSON.parse(profile._raw).email
            , gravatar: JSON.parse(profile._raw).gravatar  
            , username: JSON.parse(profile._raw).handle
            , provider: 'singly'
            , singlyId: profile.username
            , password: 'blank'
          //  , services: profile._raw
          })
          user.save(function (err) {
            if (err) console.log(err)
            return done(err, user)
          })
        }
        else {
          return done(err, user)
        }
      })

  }
));
} 

// my 2 Singly routes, which are in my routes.js file

app.get('/auth/singly/callback', passport.authenticate('singly', { failureRedirect: '/login' }), users.authCallback)
app.get('/auth/singly/:service', passport.authenticate('singly'));

// show.dust, rough sample of Dust (Linked in version) template page users are redirected to:

{>base/}

{<content}

{#user}

<h1 id="page-title">{name}'s Profile</h1>

<div>our user name should be: {name}</div>
<div>Pic: <img src="{gravatar}"/></div>
 
 {/user}

{/content}