How to get Facebook Alternate Name via Graph API?

I am using the Facebook Graph API and Facebook Connect to make an authentication system in Word开发者_如何学编程press. The Connect part goes all ok, the Facebook Graph goes ok as well.

But: How do I fetch the Facebook Alternate Name? I searched the docs at http://developers.facebook.com/docs/reference/fql/user/, but found no trace of it. Any ideas?

The main idea is that privacy is a concern, and the system goes better nickname based than just last name based. If the Alternate Name is empty I just ask the user to enter a nickname.

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I think that it is not exposed yet, when i was looking for this, i made a work around...

I know that if you use the search_tokens field at user table, the array will have the alternate name... If you have luck, the array will contain the first, middle, last, and the alternative name, so, compare the arrays to the names, and exclude the know names, the other one is the alternative name....

Look this bug:

https://developers.facebook.com/bugs/371978199536659/