Plasma Vaults is a new plasmoid which makes encrypted folders you can lock and unlock to keep your files hidden from GCHQ. Appstream file needs an icon https://bugs.kde.org/show_bug.cgi?id=385583
there is already an app icon it's called plasmavault and located in breeze-icons/apps/48 where is the source code of vault?
oh aye, sorry I'm not sure how I missed it. And I'm not sure why neon appstream doesn't pick it up. I'll take another look. https://cgit.kde.org/plasma-vault.git/