Spring Security OAuth2 support for resource server.

[gm2552]

The service bindings library currently supports the oAuth 2 client settings for spring security which works very well. In many cases where an oAuth2 client is present in an application stack, additional applications will play the role of resource servers. The following articulates articulates a few patterns: https://www.baeldung.com/spring-cloud-gateway-oauth2

With the release of the AppSSO package in TAP 1.2 and the use of the ClientRegistration CRD, the ability to use service bindings for oAuth2 and OIDC facilitates the creation and distribution of oAuth properties for application consumption. Currently, there is not a capability to use service bindings secrets to populate resource server properties in spring boot apps. It would be ideal for resource server applications to be able use service bindings to population spring. security.auth2.resourceserver properties.