I have a users table on my website and I want to allow users to connect to facebook. I am having success with the pop-up login and them authorizing my website. However how do I disconnect them from facebook later if they choose to? If they've signed up for my website with a different email than facebook, I can't use unregisterUsers with the hashed email from my database.
Is there a way to get their hashed email from facebook at any time?