我今天一直在研究一个类似的问题。以下是我所做的：

add_filter(\'rest_dispatch_request\', function($dispatch_result, $request, 
$route, $handler) {
    if (!is_user_logged_in()) {
        $dispatch_result = new WP_Error(
            \'rest_not_logged_in\',
            __( \'You are not currently logged in.\' ),
            array( \'status\' => 401 )
        );
    }

    return $dispatch_result;
}, 10, 4);