public ActionResult <IEnumerable <string> > GetBookings(LoginPost loginPost, string eventUid)
        {
            var eventId = new VeranstaltungenModel().GetEvent(eventUid);

            if (eventId == null)
            {
                return(NotFound());
            }

            var calendarId = new VeranstaltungenModel().GetCalendarId(eventUid);

            if (!auth.CheckIfCalendarPermissions(loginPost, calendarId))
            {
                return(Unauthorized());
            }

            var query = Request.QueryString.ToUriComponent();

            query = System.Web.HttpUtility.UrlDecode(query);

            var result = model.GetBookings(eventUid, query);

            if (result != null)
            {
                return(Content(result, "application/json"));
            }
            else
            {
                return(NotFound());
            }
        }