public IActionResult Rewards()
{
var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);
ViewBag.RewardsProvided = _rewardService.GetRewardsProvided(userId);
ViewBag.RewardsQualified = _rewardService.GetRewardsQualified(userId);
ViewBag.EventsAttended = _eventService.GetAttendancesByUser(userId).Select(a => a.EventId).ToHashSet();
return(View());
}