public PartialViewResult GetParticipants(int eventId)
{
var participants = repository.Participants.Where(x => x.EventId == eventId).ToList();
var selectEvent = repository.Events.Where(x => x.EventId == eventId).FirstOrDefault();
ViewBag.isCreator = selectEvent.Creator.Equals(HttpContext.User.Identity.Name);
return PartialView("_GetParticipants", participants);
}