Add caller id or username to group event messages

on group events like added, kicked, promoted, demoted & banned, server send a message to group channel, but there is not any info about caller (who did this action like kicking).
i checked file core_group.go and find out there is id of caller in group events functions and content of event messages are empty, can you add caller id into content of message(or somewhere else)?
this help game developers to inform events better in group chat, e.g. “Player X kicked out from the group by Admin Y” .

You can add this as an AfterHook to the various APIs to expose the user who performed this.