I'm using passport.js for the authentication and handling of sessions in my project.

I use email to authenticate from passport but when the done is called on verification, I get the error done is not a function.

at Promise.<anonymous> (/Users/sultan/Desktop/too2/controllers/users.js:39:28)

at Promise.<anonymous> (/Users/sultan/Desktop/too2/node_modules/mongoose/lib/promise.js:120:8) 

Code

  // LOCAL LOGIN =============================================================

passport.use('local-login', new LocalStrategy({

    usernameField : 'email',

    passwordField : 'password'

    //passReqToCallback : true // allows us to pass in the req from our route (lets us check if a user is logged in or not)

},

function( email, password, done) {

    if (email)

        email = email.toString().toLowerCase();



    // asynchronous

    process.nextTick(function() {

        User.findOne({ email:  email }, function(err, user) {

            // if there are any errors, return the error

            if (err)

                return done(err);



            // if no user is found, return the message

            if (!user)

        //(/Users/sultan/Desktop/too2/controllers/users.js:39:28)

                return done(null, false, {message: 'No user found.'});



            if (!user.validPassword(password))

                return done(null, false, {message: 'Oops! Wrong Password'});



            // all is well, return user

            else

                return done(null, user);

        });

    });



}));

What is the cause of this error and how do I resolve it?