todo:
find a replacement for
https://docs.spring.io/spring-security/oauth/apidocs/org/springframework/security/oauth2/client/OAuth2RestTemplate.html
https://github.com/spring-projects/spring-security-oauth/blob/master/spring-security-oauth2/src/main/java/org/springframework/security/oauth2/client/OAuth2RestTemplate.java

https://stackoverflow.com/questions/58982286/spring-security-5-replacement-for-oauth2resttemplate