public async Task <IActionResult> PutShopAccount(string id, ShopAccount shopAccount)
        {
            if (id != shopAccount.Username)
            {
                return(BadRequest());
            }

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

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

            return(NoContent());
        }
        public async Task <ActionResult <ShopAccount> > PostShopAccount(ShopAccount shopAccount)
        {
            _context.ShopAccount.Add(shopAccount);
            try
            {
                await _context.SaveChangesAsync();
            }
            catch (DbUpdateException)
            {
                if (ShopAccountExists(shopAccount.Username))
                {
                    return(Conflict());
                }
                else
                {
                    throw;
                }
            }

            return(CreatedAtAction("GetShopAccount", new { id = shopAccount.Username }, shopAccount));
        }