private async Task ValidateEvent(CreateEventDto eventDto)
{
var userExists = await _usersDbSet.AnyAsync(u => u.Id == eventDto.ResponsibleUserId);
var eventTypeExists = await _eventTypesDbSet.AnyAsync(e => e.Id == eventDto.TypeId);
_eventValidationService.CheckIfEndDateIsGreaterThanStartDate(eventDto.StartDate, eventDto.EndDate);
// ReSharper disable once PossibleInvalidOperationException
_eventValidationService.CheckIfRegistrationDeadlineExceedsStartDate(eventDto.RegistrationDeadlineDate.Value, eventDto.StartDate);
_eventValidationService.CheckIfResponsibleUserNotExists(userExists);
_eventValidationService.CheckIfOptionsAreDifferent(eventDto.NewOptions);
_eventValidationService.CheckIfTypeDoesNotExist(eventTypeExists);
}
