How to find a Slack user ID
Workast is a task management app for teams that use Slack. Team members can create and manage tasks inside of Slack, and using the Workast web app. Try it out by installing Workast in the Slack marketplace today.
Click on a user name within Slack.
Click on "View full profile" in the menu that appears.
Click the ellipses (three dots).
Click on "Copy Member ID".