login with a Facebook login button and be redirected to a protected folder

I would like to have users have the option to register on my website or login with a Facebook login button and be redirected to a protected folder . The protected folder contains a webconfig set to deny unauthorized users. So the way I imagine things should go and the end result should be 1) A Facebook login button appears on my login page 2) If user clicks on the Facebook button, then a pop up should appear with the Facebook login page. 3) Once the user logs in, they are redirected to the protected webpage named dashboard , it is kept in a protected folder named members. That's it. Step 3 is going to be tricky if you do not know how to make ASP.net membership tables recognize a Facebook login as an authorized user. Users are normally created when they use the register form and then they can login and be redirected to the protected folder and view the webpage called dashboard. I want the same thing to happen when the user decides they want to login with Facebook button. We need to make sure they become part of the asp users? Not sure , this is why I am here.