List fee rate tiers

FeeRatesService feeRatesService = IntxServiceFactory.createFeeRatesService(client);
GetFeeRateTiersResponse response = feeRatesService.getFeeRateTiers();

var feeRatesService = new FeeRatesService(client);
var response = feeRatesService.GetFeeRateTiers();

client = IntxClient()
request = ListFeeRateTiersRequest()
response = client.list_fee_rate_tiers(request)

const feeRatesService = new FeeRatesService(client);

feeRatesService.listFeeRateTiers().then(async (response) => {
    console.log('Fee Rate Tiers: ', response);
})