PowerShell & Power BI Rest API - powershell

Question

Essentially what I'm after is the results of rest API Gateways - Get Datasource Users but retaining the ID (in this example $Line.id from my imported CSV file).
The end result should be a CSV with the following fields -
ID, emailAddress, datasourceAccessRight, displayName, identifier, principalType
I'm new to PowerShell and surprised I got this far but can't figure out this final bit.
Cheers
$webclient=New-Object System.Net.WebClient
$webclient.Proxy.Credentials = [System.Net.CredentialCache]::DefaultNetworkCredentials
$Dir = "C:\pbi_pro_user_logs\"
Login-PowerBI
$GateWayFile = Import-CSV -Path "C:\pbi_pro_user_logs\Gateway_Detail.csv"
$Output = #()
foreach ($Line in $GateWayFile){
$Item = $Line.id
$url = "https://api.powerbi.com/v1.0/myorg/gateways/HIDDEN/datasources/"+$Item+"/users"
$Output += (Invoke-PowerBIRestMethod -Url $url -Method Get | ConvertFrom-Json)
}
$Result = $Output.value
$Result | Export-Csv $Dir"GateWay_users.csv" -NoTypeInformation

Answer 1

Try this, using a calculated property from Select-Object:
$GateWayFile = Import-CSV -Path "C:\pbi_pro_user_logs\Gateway_Detail.csv"
$Output = Foreach ($Line in $GateWayFile){
$url = "https://api.powerbi.com/v1.0/myorg/gateways/HIDDEN/datasources/"+$Line.id+"/users"
$Item = (Invoke-PowerBIRestMethod -Url $url -Method Get | ConvertFrom-Json)
# output all properties of the item, plus the ID:
$ItemWithID = $Item | Select *,#{l='Id';e={$line.id}}
Write-Output $ItemWithID
}
# This depends on how you want your csv structured, but for example:
$Result = $Output | Select Id,Value
Or, if Value is a whole object that ID should be assigned inside of, then change the selection lines:
$ItemWithID = $Item.Value | Select *,#{l='Id';e={$line.id}}
$Result = $Output