module.exports = {
    USERNAME: 'username',
    PASSWORD: 'password'
};

register: function (request, response) {
    var user = {}
    user[constant.USERNAME] = request.body[constant.USERNAME]
    user[constant.PASSWORD] = request.body[constant.PASSWORD]
    // do anything with user object..
}

register: function(request, response) {
    var user = {
        username: request.body.username,
        password: request.body.password
    }
}