ctrlb-prod-fw/config/passport.js

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

passport.use(new LocalStrategy({
    usernameField: 'email'
  },
  function(username, password, done) {
    try {
      User.findOne({ email: username }, function (err, user) {
        if (err) { return done(err); }
        // Return if user not found in database
        if (!user) {
          return done(null, false, {
            message: 'User not found'
          })
        }
        // Return if password is wrong
        if (!user.validPassword(password)) {
          return done(null, false, {
            message: 'Password is wrong'
          })
        }
        // If credentials are correct, return the user object
        return done(null, user)
      })
    }
    catch(e) {
      console.log('error', e.message)
    }
  }
))