public IActionResult UpdateConvention(string conId, string activeTab = null, string errorMessage = null)
        {
            SetActiveTab(activeTab);
            var conUpdateViewModel = Gateway.BuildConventionUpdate(conId);

            conUpdateViewModel.ErrorMessage = errorMessage;
            return(View("UpdateConvention", conUpdateViewModel));
        }
        public IActionResult ShowDetails(string id)
        {
            var conUpdateViewModel = Gateway.BuildConventionUpdate(id);

            return(View("ShowDetails", conUpdateViewModel));
        }