Hi, I'm trying to instore about the same system as asp.net authentication system, but I have no idea how to make it. I would like to make it possible to link an existing account with a Windows Live ID, using the same UserId, so it would keep the same profile etc. Since we can't get the password of a user, I'm wondering how it would be possible to authenticate an user when he logs into my website from the Windows Live Login. I was thinking about authenticate the user with the method ValidateUser but then, I would need his username and his password. What would you suggest me ?
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