Rethinkdb check whether user exists and if not insert

check_user.js

var email = 'test@email.com';

r.db('dbname').table('users')
        .get(email)
        .run()
        .then(function (response) {

            if (response == null) {
                //console.log('User Not exists');

                //insert user data
                r.db('dbname').table('users').insert({
                    'email': email,
                    'Uname': uname,
                    'Fname': fname,
                    'Lname': lname,
                    password: hash
                }).run();
              
                res.redirect('/signup');
            }
            else {
                //user exists
                console.log(response);
                res.redirect('/signup');
            }
        })
        .catch(function (err) {
            //parse the error
            console.log(err);
            res.redirect('/signup');
        })