docs: @PostConstruct
      public void configure() {
          if (identityProvider.isUnsatisfied()) {
              setIdentityProvider(new EJBContextIdentityProvider(context));
          } else {
              setIdentityProvider(identityProvider.get());
          }
          if (!userGroupCallback.isUnsatisfied()) {
              setUserGroupCallback(userGroupCallback.get());
          }
          super.init();
      }