Tracking Unique Users in Signup Funnel: How to Measure Drop-off?

Hi 🙂 I have a funnel where I want to check how many users dropped between two screens in the signup flow. I’m using the screen event in a funnel. The first screen is the home screen of the app and the second screen is the verification screen. The problem I have is that users can go back and forth between those two screens, but i want to know how many unique users visited the first screen and eventually got to the second screen. My question is - should I add the “First time ever” filter on the first step (the home screen)?