public ICollection <MeetingTimeDto> GetMeetingTimes(ICollection <int> userIds, DateTime from, DateTime to, int meetingDuration, int currentMeetingId)
{
foreach (int userId in userIds)
{
ValidationHelper.IntegerGreaterThanZero(userId, name: "User id");
}
ValidationHelper.IntegerGreaterThanZero(currentMeetingId, name: "Meeting id");
return(_meetingsRepository.GetMeetingTimes(userIds, from, to, meetingDuration, currentMeetingId));
}