Invite users as editors or viewers of your root North account. Editors will have the same permissions as you do and viewers will have read only.
You can then invite team members and selecting either viewer or editor as a role
You can only invite users with the same domain name. For example person1@north.cloud cannot invite person2@north.inc.
Viewer is best suited for users that only need read only access. Editor is best suited for users that can read and edit your profile.