title: Integration of Facebook and asp.net membership
body: <p>I want to allow users to sign up to my website using Facebook. I already use the JS SDK on the client side for authentication and authorization and the C# sdk on the server side to get all the information I need to complete the user profile.
  My issue is that I order to allow the user to login with his facebook account, I need to create a username and password for him in my membership provider.
  I already decided I'll use the Facebook email as the username, but what can I do about the password? How can I later authenticate him?</p>
  
  <p>Thank you!</p>
  
  <p><strong>Edit:</strong> What I am actually asking is: Once the user authenticates via Facebook for the first time and I have all his info, how would I go about maping that info to a membership user (in terms of username and password) and how would I go about loging him back in (sending him a memebrship cookie in the response) the next time he wants to login with his already created user. I know I need to authenticate via facebook each time, but I'm considering how I deal with the asp.net membership side, not the Facebook side of things. Sorry if I was unclear before :)</p>