https://blog.gongquiz.com/2022/06/23/%ec%9d%b8%ea%b3%b5%ec%a7%80%eb%8a%a5-%eb%a7%a4%ec%9e%a5-%ec%95%84%eb%a7%88%ec%a1%b4-%ea%b3%a0amazon-go%ec%97%90-%ea%b0%80%eb%8b%a4-%e3%8f%85/