Managers with admin access can delete/disable a user via the admin console. Please follow the steps below to de-activate a user account.
Step 1: Navigate to your Admin Console on the lefthand panel
Step 2: In your Admin Console, locate and click on 'User Profiles & Stats'
Step 3: Select and click on a user to be de-activated.
Step 4: Click on the disable user button. The user is now de-activated and will no longer be able to log in.