Unless your BSOFH disables adding slack apps without their permission, and, well, their name says it all.
You don't need to add wee_slack as a Slack app. It just needs your xoxc- API token, which can be stripped from a logged in browser session.
Wait, does that mean that anyone can use Weechat with Slack? I thought I had to add an integration (so it has to be validated by my company), and then the puppeting would show me as [bot] or something...
The integration exists entirely to give you easy access to a token. They can be received manually if you aren't allowed to add an integration. I grabbed one manually from work ~6 months ago and it still works after all this time.
I tried searching Google for what BSOFH means, and your reply was on Page 1. Care to enlighten us?