public async Task <Response> AddAttendance(Class Class, Attendance Attendance)
        {
            Response response = new Response();

            try
            {
                response = await _repository.AddAttendance(Class, Attendance);

                return(response);
            }
            catch (Exception e)
            {
                StringBuilder sb = new StringBuilder();
                log.Error(sb.AppendLine(e.Message).AppendLine(e.StackTrace).ToString());
                response.Success = false;
                response.ErrorList.Add("Error while adding Attendance in class.");
                return(response);
            }
        }