public async Task <IActionResult> PostMember([FromBody] Member member)
        {
            if (!ModelState.IsValid)
            {
                return(BadRequest(ModelState));
            }
            member.Salt      = getSalt.Salt();
            member.Password  = hashPassword.Md5(member.Password + member.Salt);
            member.CreatedAt = member.UpdatedAt = DateTime.Now;
            _context.Members.Add(member);
            await _context.SaveChangesAsync();

            return(CreatedAtAction("GetMember", new { id = member.Id }, member));
        }