success.html

<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <title>PenguinMod - Logging In</title>
    </head>
    <body>
        <p>Please wait...</p>
        <script>
            const opener = window.opener || window.parent;
            if (!opener) {
                throw new Error('No parents');
            }
            
            setTimeout(() => {
                // wrapper to handle errors & be easier
                function post(data) {
                    opener.postMessage(
                        {
                            a2: data,
                        },
                        'https://www.snail-ide.com/'
                    );
                }

                const searchParams = new URLSearchParams(location.search);
                const privateCode = searchParams.get("privateCode");
                post({
                    pv: privateCode
                });
            }, 500);
        </script>
    </body>
</html>