aws fms list-member-accounts
Returns a MemberAccounts object that lists the member accounts in the administrator's Amazon Web Services organization. AWS CLI reference
2 options Its page in the AWS CLI reference
Options
--max-resultsSpecifies the number of member account IDs that you want Firewall Manager to return for this request.--next-tokenIf you specify a value for MaxResults and you have more account IDs than the number that you specify for MaxResults, Firewall Manager returns a NextToken value in the response that allows you to list another group of IDs.