OrganisationUser Objects
role_mnemonic_name and member_type are plain strings rather than the
constrained types used when adding a user, so that listing keeps working if
the backend introduces new roles or member types.
Arguments:
email- Email address of the user.role_mnemonic_name- Mnemonic name of the user’s organization role, for example"MEMBER".role_uuid- Identifier of the user’s organization role.member_type- Whether the user is an"internal"member of the organization or an"external"collaborator.created_at- When the user joined the organization.last_edited_at- When the user’s membership was last modified.

