Code using the WP HTTP API to post to the EE4 REST API

using-wp-http-api-to-post-to-ee4-rest-api

$response = wp_remote_request(
    'http://src.wordpress-develop.dev/wp-json/ee/v4.8.36/answers',
    array(
        'method' => 'POST',
        'headers' => array(
            'Authorization' => 'Basic ' . base64_encode( YOUR_USERNAME . ':' . YOUR_PASSWORD ),
        ),
        'body' => array(
            'REG_ID' =>1,
            'QST_ID' => 10,
            'ANS_value' => 'Alderan'
         )
    )
);