public async Task <List <LectureInfoDto> > GetInstructorLectures(int userId)
{
List <LectureInfoDto> lectureInfos = new List <LectureInfoDto>();
List <Lecture> lectures = await _lectureRepository.GetInstructorLecturesById(userId);
User instructor = await _userRepository.GetUserById(userId);
foreach (Lecture lecture in lectures)
{
lectureInfos.Add(new LectureInfoDto(lecture, instructor));
}
return(lectureInfos);
}