Thank you for the pointers.
I've been looking up by SID because that's what is showing in the API logs.
We got a lot of admin accounts, some tools like algosec and a few scripts doing regular query on the API.
It would have been neat for me to have a way to identify user activity directly from the api.elg file in order for me to contact a software admin, a user, or a team in charge of a script/software in order to show them ways to improve their workflow (eg: too many calls on a short period of time, unescessary non-filtered requests, wrong timing because it's telescoping with another script etc...)