I’m creating a login/registration using Facebook Graph and i made a popup on app authentication. It works fine except on the frontend, it doesn’t center my app dialog. Here’s a screenshot.

Is there a variable i need to pass so that it will fit my pop up window?
Add
display=popupto the parameters – that’ll give you a smaller version of the dialog that designed to fit into a popup.See docs here: https://developers.facebook.com/docs/reference/dialogs/