How can I query the Facebook Graph to get users who previously connected with my application?

How do you query the Facebook Graph to get all the users who have connected with your application? I am not storing their 开发者_如何学编程user ID, email or any other data from the user when they first connected with the app. Is there a way to get this data retroactively?

You're probably out of luck then, as you have to have at least the user ID to query the user FQL table. Your best bet is to implement something that recaptures old installs as existing users come back to your application and capture the data at that time.