Android : Screenshots that show our review team how you're using Facebook in your app (4 minimum)

Facebook requires 4 screenshots for review. But the reality is I only have one relevant screenshot.

I am using Facebook to let users post photos they share in my app on Facebook. So basically a user needs to grant me publish_actions permission. To get that permission, I ask them to log in. So the Login DialogFragment is the only relevant screenshot. When I share a photo it happens in the background, as the user grants permission once. But I cannot submit without 4 screenshots. What should I do in this case? I am afraid if I include the same screenshot 4 times they may disqualify my app without actually looking at the app.