OAuth 2.0

http://earlybird.kr/1584

http://hyunalee.tistory.com/4

1. session, cookie, token

2. spring security filter 종류 https://yongdev.tistory.com/139

OAuth 2.0 인증 방식 

https://cheese10yun.github.io/oauth2/

https://okky.kr/article/420615

1. Authorization Code Grant Type : 권한 부여 코드 승인 타입

2. Implicit Grant Type : 암시적 승인

3. Resource Owner Password Credentials Grant Type

4. Client Credential Grant Type