public ActionResult <IEnumerable <AppointmentViewModel> > FindByIdUser(String staffid)
        {
            var response = _Service.FindByIdUser(staffid);

            if (response.Error)
            {
                return(BadRequest(response.Message));
            }
            var patient = response.Object.Select(p => new AppointmentViewModel(p));

            return(Ok(patient));
        }