azure stack, get usage report

$configtoken = ""

do {
    $aggr = Get-UsageAggregates -ReportedStartTime "01/01/2018" -ReportedEndTime "02/02/2018" -ShowDetails:$true -ContinuationToken $configtoken -AggregationGranularity Hourly
    $aggr.UsageAggregations | ft
    $configtoken = $aggr.ContinuationToken
}
while($configtoken -ne $null)