We recommend using Organizations instead of Security Hub invitations to manage your member accounts. For information, see Managing Security Hub administrator and member accounts with Organizations in the Security Hub User Guide.
See https://www.paws-r-sdk.com/docs/securityhub_decline_invitations/ for full documentation.
securityhub_decline_invitations(AccountIds)
[required] The list of prospective member account IDs for which to decline an invitation.