Accepts the invitation to be a member account and be monitored by the Security Hub administrator account that the invitation was sent from.
See https://www.paws-r-sdk.com/docs/securityhub_accept_administrator_invitation/ for full documentation.
securityhub_accept_administrator_invitation(AdministratorId, InvitationId)
[required] The account ID of the Security Hub administrator account that sent the invitation.
[required] The identifier of the invitation sent from the Security Hub administrator account.