issuing_datestring<Date>Requiredtotal_amountobject<Amount>Requiredcurrency_codestring<Currency>Requiredtaxes_amountobject<Amount>Requiredcurrency_codestring<Currency>Requiredcharges_usageobject<CustomerChargeUsage>[]Requiredamountobject<Amount>Requiredcurrency_codestring<Currency>Requiredchargeobject<UsageBasedCharge>Requiredcharge_modelenum<ChargeModel>Optionaltaxesobject<TaxResponse>[]Optionalcodestring<TaxCode>Optionalmetricobject<CustomerUsageMetric>Requiredaggregation_typeenum<string | null>Required