public async Task AddAsync(string userId, int eventId)
{
var result = await _userEventRepository.AddAsync(new UserEvent { ApplicationUserId = userId, EventId = eventId });
if (result.Status == RepositoryStatus.NotFound)
{
throw new ServiceException(ErrorCodes.BadRequest);
}
if (result.Status == RepositoryStatus.Error)
{
throw new ServiceException(ErrorCodes.DatabaseError);
}
}