To invite or view your admins, click Account Settings in the bottom-left corner of the sidebar.

Switch to the Team Settings tab to view your current admins and then select, Add User to add any additional admins.

Enter the email address of the Admin you wish to add, and then select Invite. The user will be added as a Teammate.

Follow the same steps above to get to the Team Settings page and then use the trashcan icon to delete the teammate(s).