How to get Facebook username during Social authentication

[tunavargi]

I have sucessfull facebook connection but,
I have extra_data like below.

{"access_token": "CAAH6hVCrlMgBAIeRxNjdC9oqolZA482LlKtbdFZB3u1R28WcRFPbU4VDkNKptZCTZCX7sVtpyiZCZASafy619ke3ZCtZBd2zmZAWWWoZCA92i0ogGAvM0JA8eFRzkVD96GL82tqnZCB9hPpT4SpsekxNp5bR50gcY04pEylYUw1NUp7j", "expires": "5183999", "id": "513697145"}

Is there an easy way to access to users facebook username

[omab]

If users signup in your site with Facebook, then user.username should be the Facebook username, but you can define: SOCIAL_AUTH_FACEBOOK_EXTRA_DATA = ['username'] and it will be stored in social.extra_data dict under the key username.