Click the "Users" tab on the left hand side bar to open a drop down menu.
Press "List Users" on the newly opened menu.
This brings you to a list of all Users you have administrative power over. At the far right of each listed User there is status indicator, in order to erase a User it must be set to stop.
Click the status to access the drop down menu.
Select stop then wait a moment for a confirmation message to display above the Users list.
Once the confirmation message displays, click the status again then select erase from the menu.
A confirmation message will now display acknowledging that the User has been deleted.