Es specify user name and password when instantiating resthighlevelclient

Reference code

RestClientBuilder builder = RestClient.builder(new HttpHost(), port);
// Start setting user name and password 
CredentialsProvider credentialsProvider = new BasicCredentialsProvider();
credentialsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(username, password);
builder.setHttpClientConfigCallback(f -> f.setDefaultCredentialsProvider(credentialsProvider));