check if player(s) logged into a game between gaming sessions

Hi all, wonder if there is a way to see if players logged into a game between two scheduled sessions? Lets say last session was July 2nd, next scheduled game is July 30th. Players wants to do some work on their character sheets, write some more section in editable notes, etc. Can I see if between July 2nd and July 30th anyone logged into the game? Thanks!

Pretty sure you could do this with some API scripting. Like, make a script that writes to a handout whenever a player logs in. Then clear out the handout after the session.

hmmm... OK so probably have to start diving into API scripting. Sounds time consuming. Am still new here so apologies if am asking for well known things. Is there a reference guide explaining which queries and their parameters and values are supported? Thanks!