does anyone know a quick and simple way to also give access to a WordPress standard password-protected page if there is an existing third party cookie on the user's machine? I need to see if someone is already logged into another platform, and if so give them access WITHOUT having to also enter the WordPress page password.
In other words, for a user to view a specific password-protected page, they have to satisfy one of two criteria.
EITHER: The user has entered the WordPress page password (and so there is a WordPress generated cookie on their machine) OR There is a third party cookie, whose filename and content are known, already existing on the user's machine.
Any hints and help on the best / simplest way to achive this will be gratefully received!