Automate Slack usernames based on group

[roxworks]

Could be cool to have [RTP] [Financial] [Drink Admin] and do it all in an automated way

[mxmeinhold]

I think this would require consistent username formatting (e.g [R] Name). There are enough inconsistencies (e.g. N[A]me) that I'm not sure how feasible this would be without rewriting names entierely.

Alternatively, do something like match \[.*?\] and overwrite with role, else prepend role to name.