public async Task <IActionResult> PutLearningSchedule(string userName, LearningSchedule learningSchedule)
        {
            if (userName != learningSchedule.UserName)
            {
                return(BadRequest());
            }

            _context.Entry(learningSchedule).State = EntityState.Modified;

            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateConcurrencyException)
            {
                if (!LearningScheduleExists(userName))
                {
                    return(NotFound());
                }
                else
                {
                    throw;
                }
            }

            return(NoContent());
        }
        public async Task <ActionResult <LearningSchedule> > PostLearningSchedule(LearningSchedule learningSchedule)
        {
            //var l = _context.LearningSchedules.FindAsync(learningSchedule.UserName);
            if (LearningScheduleExists(learningSchedule.UserName))
            {
                _context.LearningSchedules.Update(learningSchedule);
                await _context.SaveChangesAsync();

                return(learningSchedule);
            }
            else
            {
                _context.LearningSchedules.Add(learningSchedule);
                await _context.SaveChangesAsync();

                return(CreatedAtAction("GetLearningSchedule", new { userName = learningSchedule.UserName }, learningSchedule));
            }
        }