Basic Auth for Swift AI prebuild

add_filter('http_request_args', function($r){
    // Check if it is a prebuild request
    if (isset($r['headers']['X-PREBUILD'])) {
        $user = 'YOUR_USERNAME';
        $password = 'YOUR_PASSWORD';
        $r['headers']['Authorization'] = 'Basic ' . base64_encode( $user . ':' . $password );
    }

    return $r;
});