https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-security
https://github.com/spring-cloud/spring-cloud-security

https://javadoc.io/doc/org.springframework.cloud/spring-cloud-security/latest/index.html

src
https://github.com/spring-cloud/spring-cloud-security/blob/master/spring-cloud-security/src/main/java/org/springframework/cloud/security/oauth2/client/feign/OAuth2FeignRequestInterceptor.java
    https://javadoc.io/doc/org.springframework.cloud/spring-cloud-security/latest/org/springframework/cloud/security/oauth2/client/feign/OAuth2FeignRequestInterceptor.html