public async Task AddAttendenceImage(AttendenceImage attendenceImage)
        {
            using (var imHereDbContext = new ImHereDbContext())
            {
                await imHereDbContext.AddAsync(attendenceImage);

                await imHereDbContext.SaveChangesAsync();
            }
        }
        public async Task AddAttendenceImage(string lectureCode, int week, string image_url)
        {
            AttendenceImage attendenceImage = new AttendenceImage();

            attendenceImage.lectureCode = lectureCode;
            attendenceImage.week        = week;
            attendenceImage.image_url   = image_url;

            await _attendenceImageRepository.AddAttendenceImage(attendenceImage);
        }