To view the available Groups in your Workspace you can click on the Groups menu item under User management.

As shown here, when your Workspace is created three groups are automatically set up for you. 

Developers – Can create Models and access the API details page

Editors – Can create and publish content and assets

Workspace Admins – Can do everything Developers and Editors can do, while also having access to update the Workspace settings, create new Groups and invite users to the Workspace.

To view and edit any of these groups you can click on the pencil icon.

On the groups form you can see the details of the group such as Owner, group email, Role and Members.

By default the creator of the Workspace is set as the Owner and a member of the group. You remove members by clicking on the X next to their names and add new members by clicking the Add Members button at the bottom of the list of members.