Where to find an unpublished collection

[Gunk]

I was trying to make a collection of steam workshop mods but went to add mods to it and accidentally closed the tab. Now I can't find it but I still can add workshop items to it. Where can I find it?

[Gunk]

Nevermind I found it.

For anyone who comes after me looking for this: Its under the game's properties in your library then in workshop then advanced settings.