I cannot add an SDL Cloud MT service in a GroupShare project

I work as a freelance and one agency provides me the GroupShare projects.

I want to test SDL Cloud MT services but, when I open the project settings of the GS project, I cannot add any of the services, they are all greyed out, I can only add a file based translation memory and/or use those provided by the agency.
When I create a local project, I can add all the services.

Is there something I have to do to enable those services in a GS project, or is that all set up by the agency when they create the GS project?