As with any log in option, if you are using PPI, you will be asked to use PIN or your account’s password to license your inputs once you decide to export something from RealityCapture.
Since to log in with your Epic Gam…
https://dev.epicgames.com/community/learning/knowledge-base/3Kve/capturing-reality-how-to-use-ppi-with-epic-games-account