public RootModule(IAppUserMapper userMapper)
        {
            Get["/"] = _ => View["index"];

            Get["/logout"] = _ =>
                                 {
                                     var user = Context.CurrentUser as User;
                                     if (user != null)
                                         userMapper.Remove(user.Identifier);

                                     return this.LogoutAndRedirect("~/");
                                 };
        }