在里面WP REST API v2 使用permission_callback 在中找到Adding Custom Endpoints Docs.

<?php
add_action( \'rest_api_init\', function () {
    register_rest_route( \'myplugin/v2\', \'/author/(?P<id>\\d+)\', array(
        \'methods\' => \'GET\',
        \'callback\' => \'my_awesome_func\',
        \'args\' => array(
            \'id\' => array(
                \'validate_callback\' => \'is_numeric\'
            ),
        ),
        \'permission_callback\' => function (WP_REST_Request $request) {
            if ( current_user_can( \'edit_others_posts\' ) ) {
                return true;
            } 
            else { 
                return false;
            }
        }
    ) );
} );