4. Add AWS KEY to [config.json](http://khuhub.khu.ac.kr/2015104201/OSS2020-2_Screensaver/blob/master/screensaver_ver2/config.json) from [AWS](https://aws.amazon.com/ko/premiumsupport/knowledge-center/create-access-key/)
4. Add AWS KEY to [config.json](http://khuhub.khu.ac.kr/2015104201/OSS2020-2_Screensaver/blob/master/screensaver_ver1/config.json) from [AWS](https://aws.amazon.com/ko/premiumsupport/knowledge-center/create-access-key/)