Step 1: Click “Setting” on the left taskbar => Choose “Members"

Step 2: Find the user you want to delete from the list.

Step 3: Click the red "Delete User" button next to the corresponding user.

NOTE: After deleting a user, their comments or notes will still remain, but the user's name will be displayed as "deleted user." Additionally, any Nuts assigned to that user will be shown as "no assignee."