Slack slash commands

Gitlub EE is confusing. Say I have 100 projects but each integration is set up per project. It means that for every project I need to set it up again. It might work for some parts, but let’s look at Slack.

I added this slash command integration, so when one writes /gitlab, she gets some commands that can be done on a single project! How does this suppose to work in an enterprise? Do I set up another command like /gitlab1, /gitlab2 or I am missing something obvious?