[ 관련 링크 ]
1. https://www.yoctopuce.com/EN/interactive/OAuth2/
2. https://bshaffer.github.io/oauth2-server-php-docs/
3. https://developers.google.com/oauthplayground/
4. https://www.youtube.com/playlist?list=PLfdtiltiRHWFIbiGNaGW1qreZNrx7uOAG