public async Task <IActionResult> GetAchievementByCourseNum(string Num)
{
var avs = await _achievementService.GetAchievementsByCourseNum(Num);
if (avs.Count == 0)
{
return(NotFound());
}
var res = _mapper.Map <List <AchievementDto> >(avs);
return(Ok(res));
}