// Helper Methods
        public GlucoseTrackerService CreateGlucoseTrackerService()
        {
            var userId  = Guid.Parse(User.Identity.GetUserId());
            var service = new GlucoseTrackerService(userId);

            return(service);
        }
        // GET: GlucoseTracker/Index
        public ActionResult Index()
        {
            var userId  = Guid.Parse(User.Identity.GetUserId());
            var service = new GlucoseTrackerService(userId);
            var model   = service.GetGlucoseTracker();

            return(View(model));
        }