passport.use('signup', new LocalStrategy(
    {
        usernameField : 'email', // the name of username that got passed into this strategy
        passwordField : 'password', // the name of the password that got passed into tis strategy
        passReqToCallback : true
    },
    function(req, email, password, done) {
        // done(...) where ... is (err, user, info)
        process.nextTick(function() {
            // find user with username
            User.findOne({ email : email }, function(err, user){
                if(err) return done(err);
                if(user) return done(null, false, { message : 'User already exists.' });

                // save the user
                var newUser = new User();
                newUser.email = email;
                newUser.password = newUser.generateHash(password);

                newUser.save(function(err) {
                    if(err) return done(err);
                    return done(null, newUser);
                });
            });
        });
    }
));

User.find({}, function(err, users){
                console.log(users);
            });