/// <summary>
        /// Gets the tenantId based on the domain.
        /// </summary>
        /// <param name="routeData"></param>
        /// <returns>The Tennant Id, which is the Account.Id associated with the domain in the route information.</returns>
        public static int GetTenantId(this System.Web.Routing.RouteData routeData)
        {
            DomainRoute dr = (DomainRoute)routeData.Route;
            ShoelaceDbContext db = new ShoelaceDbContext();
            int tenantId = -1;
            var sub = routeData.Values["subdomain"] as string;
            Account acc = null;

            if (sub != null)
            {
                acc = db.Accounts.FirstOrDefault(x => x.Subdomain == sub);
            }

            if (null != acc)
            {
                tenantId = acc.Id;
            }
            else
            {
                acc = db.Accounts.FirstOrDefault(x => x.VanityDomain == dr.Domain);
                if (acc != null)
                {
                    tenantId = acc.Id;
                }
            }
            return tenantId;
        }
 protected override void OnAuthentication(System.Web.Mvc.Filters.AuthenticationContext filterContext)
 {
     using (var ctx = new ShoelaceDbContext())
     {
         var tid = RouteData.GetTenantId();
         if (User.Identity.IsAuthenticated)
         {
             var ct = ctx.Users.Where(x => x.AccountId == tid && x.UserName == User.Identity.Name).Count();
             if (ct <= 0)
             {
                 HttpContext.SignOut();
                 filterContext.Result = RedirectToAction("Index", "Home");
             }
         }
     }
     base.OnAuthentication(filterContext);
 }