in src/main/java/org/apache/sling/auth/oauth_client/impl/OidcIdentityProvider.java [175:180]
private OidcUser(@NotNull OidcAuthCredentials creds) {
super(new ExternalIdentityRef(creds.getUserId(), creds.getIdp()));
this.creds = creds;
this.groups = creds.getGroups();
}