Members
Settings → Members lists everyone in the organisation: name, email, role, groups, last login.
Invite member — email plus User or Admin. Existing Interact accounts join immediately; others get an email. Only admins can invite.
Remove from organization on a member revokes access at once. Their Interact account remains; they just cannot open this organisation.
Groups
Settings → Groups segments the team (department, client, rollout). Create a group, then assign members on the Members page. A person can be in more than one group. Leave the group unset on an entity to keep it open to the whole organisation. Admins always see everything.
LLM usage caps can also be set per group or member under Settings → Usage — that limits spend, not who can open a page.