We recommend adding teachers who manage groups or handle classes to the group after granting them group management permissions. By granting group management permissions, teachers can perform operational tasks such as adding members, assigning subjects, monitoring, and setting class times themselves without going through an organization administrator.

Affiliations.Groups.Members.Management Permissions.Add / Update Permissions.Only users who already belong to the organization the group belongs to can be added to the group. If the target teacher does not yet belong to the organization, please add them to the organization first via Invite Members to Organization.
Additionally, if the group does not yet have any administrators, only an organization administrator can add the first group administrator. If you encounter an error while trying to perform this as a group administrator, please contact an organization administrator.