I have a web service providing a variety of features to logged in users, running Java Spring Boot. I am adding a new feature that requires this web service to communicate with an external resource server, accessing resources specific to the logged in user. The resource server is using OAuth2. Google drive for purposes of this question, but I will need to integrate multiple clients for different resource servers.

I have a web service providing a variety of features to logged in users, running Java Spring Boot. I am adding a new feature that requires this web service to communicate with an external resource server, accessing resources specific to the logged in user. The resource server is using OAuth2. Google drive for purposes of this question, but I will need to integrate multiple clients for different resource servers.