Authorize subdomain to access and read user and admin cookies

I resolved my problem using that: (edited

define('ADMIN_COOKIE_PATH', '/wp-admin');
define('COOKIE_DOMAIN', '.website.com');
define('COOKIEPATH', "https://wordpress.stackexchange.com/");
define('SITECOOKIEPATH', '.website.com');
define('COOKIEHASH', md5('website.com') );`

COOKIEHASH is essential

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