The WPC-Admin role has full access to WP-Client settings, but no access to the rest of your WordPress installation. This is ideal if you want to delegate the admin duties of the Portal to a staff member, but don’t want to give them full WordPress admin level capabilities. This person will only be able to manage the WP-Client plugin.
The capabilities of the WPC-Admin role can be modified by navigating to WP-Client-->Settings-->Capabilities
You can find full explanations of the different capabilities HERE
To add a new WPC-Admin in your installation, navigate to WP-Client-->Admins-->Add Admin
Once a WPC-Admin has been created, they can be edited or deleted from the menu at WP-Client-->Admins