Hi Youcef Zeghiche👋 Unfortunately, given the number of questions we get in the community, the team isn't able to offer live support. However, I can do my best to help you debug async.
Have you had a chance to carefully go though the documentation to debug? https://docs.dust.tt/docs/slack-connection
Need Help Connecting Dust with Slack: Step-by-Step Assistance Required | Dust Community