To reactivate a user in your account, go to the Team Settings page.
1. Find the user who you'd like to reactivate. Scroll through your user list, or type their name or email address in the search box.
2. Hover over their user.
3. Select the "Click to edit" button:
4. Click on the curved arrow icon to reactivate this user.
Once a user is reactivated, they can log back into Lever!
If you need to deactivate a user, here are instructions on how to do that.