I was hoping to change the chat image from the green image it is as a Default to my discord custom logo, however I don't see a configurable option to do so & after looking in the main file for the plugin I couldn't find a png or jpg file to swap out with my own custom file. Is there a reason this isn't already configurable ?

hi. it's there, Chat Steam64ID
you must use a steamid for that
so put an image on a steam account profile and use that steamid