usually when an app wants to get the user' info, the "facebook login" product must be added in the app console in the facebook developers, but when I tried to add the "instant game" product my app I couldn't, I looked around and I found that I can't add both the "facebook login" and "instant game" products in the same app,
How can I get user's info in an instant game app without using the "facebook login product ?
I need the login product because I'm using firebase and I need to store the user data in the firebase database.