I'm sure you have figured it out, but if not, and in case anyone finds this post on google like I did trying to find a player list, it's actually pretty easy to make a macro
Open the Macro Menu with Ctrl+M
Choose a Macro Slot on the top half of the window (by default Slot 1 is automatically picked when you open the window)
Name the Macro whatever you want it named, in this case I named it: Player List
Set the hotkey for whatever button you want to press to activate it, I chose P as I didn't see it as being used already in the controls list
in the commands section enter: .online
Press the Save button in the bottom left then close the window
Now anytime you press whatever button you assigned the macro to (in this example: P) it will add the player list to your chat window
Hit Tab to close chat like normal