Hello!

I'm trying to find some example of how to get the user group name and roles in a Spring Boot application. 

So far, I've gotten the user attributes and the Authority (which is alway "ROLE_USER"). But the part I'm missing is to how to get the list of groups the user belongs to? 

Here's the code so far:

@GetMapping("/print-username")

public ResponseEntity<?> printUsername(@AuthenticationPrincipal OAuth2User principal) {

  if (principal == null) {

    return new ResponseEntity<>("User not authenticated", HttpStatus.OK);

  } else {

    Map<String, Object> attributes = principal.getAttributes();

    // Print user attributes

    StringBuilder stringBuilder = new StringBuilder();

    stringBuilder.append("User Attributes:\n");

    for (Map.Entry<String, Object> entry : attributes.entrySet()) {

      stringBuilder.append(entry.getKey()).append(": ").append(entry.getValue()).append("\n");

    }

    System.out.println(stringBuilder.toString());

    // Print user roles

    Collection<? extends GrantedAuthority> authorities = principal.getAuthorities();

    for (GrantedAuthority authority : authorities) {

      System.out.println("Authority: " + authority.getAuthority());

    }

    String username = (String) attributes.get("email"); // Assuming email is the user identifier

    System.out.println("Username: " + username);

    return new ResponseEntity<>("Username printed in the server console", HttpStatus.OK);

  }

}

Any ideas?