Hello Keith,
If you go to the details web page for the namespace you created, you will
see the Admin Group defined. The UI will provide a link on the name of the
admin group that takes you to the Group details page for that group. There
you can see the members, roles, and admins for the group. You should be an
admin and a member automatically if you created the namespace. Because you
are an admin for the group, you can add other members to the group if you
want. Best,
Harrison