public async Task<IActionResult> PutSessionAttendees(int id, SessionAttendees sessionAttendees)
        {
            if (id != sessionAttendees.UserId)
            {
                return BadRequest();
            }

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

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

            return NoContent();
        }
        public async Task<ActionResult<SessionAttendees>> PostSessionAttendees(SessionAttendees sessionAttendees)
        {
            _context.SessionAttendees.Add(sessionAttendees);
            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateException)
            {
                if (SessionAttendeesExists(sessionAttendees.UserId))
                {
                    return Conflict();
                }
                else
                {
                    throw;
                }
            }

            return CreatedAtAction("GetSessionAttendees", new { id = sessionAttendees.UserId }, sessionAttendees);
        }