LI20 - How to know what user cleared count in WM?

I am looking to find out when a user executes LI20 to clear a count in WM where I can find their user name?

I can find from the count document the user who entered the count and I can find from the IM ISEG table document who made an adjustment via LI21.

However I do not seem to be able to find who cleared the WM count if no inventory discrepancies were found?

We are developing a custom report to show counts are happening, who entered them, who cleared them, who adjusted them, however I am struggling to find the user who performs LI21.

Any ideas?

Thanks.