I would guess they are requiring users to have a 'user' attribute such as a contact list or a user metadata kind set up.
^ Hey nostr:npub12vkcxr0luzwp8e673v29eqjhrr7p9vqq8asav85swaepclllj09sylpugg / nostr:npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z what is the difference between user number and public keys?
I would guess they are requiring users to have a 'user' attribute such as a contact list or a user metadata kind set up.
🫂