I have a blog with several users. I want to be able to invite others to contribute to my blog and set them up as a new user/author,etc.
If I want to add a new user, do I always have to register them and assign them a new password and username? Is it possible for them to register via facebook or twitter?
I am looking for a plugin but I have only been able to find plugins that allow people to log in via facebook or twitter if they want to comment, not if they want to write a blog post.