Logout spring boot 3

Getting advice
1

I’m working in security on my spring boot 3 application, calling the keycloak logout endpoint is working fine, and my session in keycloak is being finished. But when I call my backend with the token that is supposed to be invalid, spring still granted access, so I tried created a custom logout handler, like this:
But how to get the id_token_hint? What’s the right way to log out spring boot and keycloak session?

    @Bean
    public SecurityFilterChain securityFilterChain(HttpSecurity http) throws Exception {
        http.authorizeHttpRequests()
            .requestMatchers(HttpMethod.GET, "/test/anonymous", "/test/anonymous/**")
            .permitAll()
            .requestMatchers(HttpMethod.GET, "/test/admin", "/test/admin/**")
            .hasRole(ADMIN)
            .requestMatchers(HttpMethod.GET, "/test/user")
            .hasAnyRole(ADMIN, USER)
            .requestMatchers(HttpMethod.GET, "/test/logout", "/test/logout/**")
            .hasAnyRole(ADMIN, USER)
            .anyRequest()
            .authenticated()
            .and()
            .logout()
            .logoutSuccessHandler(KeycloakLogoutHandler)
            .invalidateHttpSession(true)
            .clearAuthentication(true)
            .deleteCookies("JSESSIONID")
            .and()
            .oauth2Login();
        http.oauth2ResourceServer().jwt().jwtAuthenticationConverter(jwtAuthConverter);
        http.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
        return http.build();
    }

    @Override
    public void onLogoutSuccess(
            HttpServletRequest request,
            HttpServletResponse response,
            Authentication authentication
    ) throws IOException, ServletException {
        String state = request.getParameter(STATE);
        try {
            response.sendRedirect("http://localhost:8080/realms/7vis/protocol/openid-connect/logout?id_token_hint=" +
                    authentication.);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}