Thank torkel,
I’m able to get ALL valid user information from another RESTFUL API, including username, email, etc, and according to the Response of /introspect endpoint mentioned in my question description, the /introspect endpoint can return me the login user’s userName, I’m thinking of writing my own RESTFUL API to return the login user’s information, how do u think about it?
BTW. I’m able to write a restful api to return a fake userinfo, and works well.