OIDC Client Credentials Token request

        Log log = LogFactory.getLog(MyTokenController.class);
        
        CloseableHttpClient httpClient
                = HttpClients.custom()
                .setSSLHostnameVerifier(new NoopHostnameVerifier())
                .build();
        HttpComponentsClientHttpRequestFactory requestFactory
                = new HttpComponentsClientHttpRequestFactory();
        requestFactory.setHttpClient(httpClient);

        RestTemplate restTemplate = new RestTemplate(requestFactory);

        log.info("new token");

        String uri = baseUrl+"/auth/realms/"+realm+"/protocol/openid-connect/token";
        log.info("Token URL : "+uri);

        String post_body = "grant_type=client_credentials&client_id="+clientId+"&client_secret="+clientSecret;
        log.info("Post body : "+post_body);

        HttpHeaders headers = new HttpHeaders();
        headers.add("Content-Type", "application/x-www-form-urlencoded");


        HttpEntity<String> request = new HttpEntity<>(post_body, headers);

        ResponseEntity<String> exchange =
                restTemplate.exchange(
                        uri,
                        HttpMethod.POST,
                        request,
                        String.class);

        String response = exchange.getBody();
        log.info("Token Response : "+response);
        ## Parse this to get Access and Request Tokens