Count = 0 to prevent duplicate

Looking at this screenshot, I can’t find where the functionality resides to say where token count = 0 to keep from having duplicate data. I saw in other posts that is a way of preventing duplicates but when I do a search I can’t find the count function. I know I’m missing something simple here but any help would be greatly appreciated!

The :count function always appears in expressions where you initiate a search.

In your case it could be something like:

Search for Challenges Users Accepteds: count is 0

Since Tokens are a constraint within this search, you can’t get the count function at this spot.

If Tokens are a datatype, you can get the count function if you search for Tokens instead