A Management Console Administrator is the only role that can manage current users. To begin managing users the Administrator will navigate to the Home page and select the Administration option  as shown below:

An Administration Options Screen will be the next step as shown here:

To Manage current users or Create a new user select the Manage Logins option and select Go.

The above box will be the next screen. From here you can see the list of users for the account and their corresponding roles. To manage a current user, select the radio button to the left of the user name and then click Manage Roles.

The above Manage Login Roles will then appear to the right of the Login List. In the Manage Login Roles screen a user can have a role removed or added by toggling the box to the left of the role on or off. Shading indicates it is on. Then click the Save button.