As CBroe already pointed out in the above comment, the Facebook API - newer than version 2.4 - changed the response and the way the requests are being sent.
You have to specify each field you want to be returned from the Graph API within your request.
For example, if you want the fields email
and name
returned, you must add them inside the request like this:
/me?fields=email,name
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…