Is having an ArcGIS account required to use an app created with AppStudio? We have a citizen science project that has been ongoing now for 10+ years. Users register on our website and that login information is also used within the smartphone app we developed a few years ago. We would like to avoid forcing people to create yet another account just to use a new version of our smartphone app considering we have over 26K registered users. Is there a way to integrate the user accounts that have already been created on our website with the login for the quick report app we are creating with AppStudio?