How to correctly bind an entity to a user who logged in via oauth?

Question

Java

Tell me, how in spring to organize work with entities that are tied to an authorized user via auth?
The problem is that when a user logged in via oauth and we only know his nickname, it’s not very good to tie up saving the entity in the application through the nickname.

Answer 1

UserDetailsService implements the findUserByUsername (emnip) method - it returns UserDetails, and there the User entity can be obtained. Or Autentification from SecurityContext with getPrincipal. Or I misunderstood the question.