List all defined variables for all release pipelines in azure devops

1. azure-devops-list-all-variables.ps1

Get-Content "auth.config" | foreach-object -begin {$h=@{}} -process { 
    $k = [regex]::split($_,'='); 
    if(($k[0].CompareTo("") -ne 0) -and ($k[0].StartsWith("[") -ne $True)) { 
        $h.Add($k[0], $k[1]) 
    } 
}

$username = $h.Get_Item("Username")
$password = $h.Get_Item("Password")
$apiVersion = "6.0"
$organization = "X"
$project = "X"

$base64AuthInfo = [Convert]::ToBase64String([Text.Encoding]::ASCII.GetBytes(("{0}:{1}" -f $username,$password)))
$headers = @{
    "Authorization" = ("Basic {0}" -f $base64AuthInfo)
    "Accept" = "application/json"
}

$response = Invoke-RestMethod -Uri "https://vsrm.dev.azure.com/$organization/$project/_apis/release/definitions?api-version=$apiVersion" -Headers $headers -Method Get

$releaseDefinitions = $response.value

$releaseDefinitions | ForEach-Object {

     $url = "https://vsrm.dev.azure.com/$organization/$project/_apis/release/definitions/$($_.id)?api-version=$apiVersion"

     $response = Invoke-RestMethod -Uri $url -Headers $headers -Method Get

     $environments = $response.environments

     foreach ($environment in $environments) {
        foreach($obj in $environment.variables.PSObject.Properties) {
            Write-Host $obj.Name, $obj.Value.value
        }
    }

    $variables = $response.variables

     foreach ($obj in $variables.PSObject.Properties) {
          Write-Host  $obj.Name, $obj.Value.value
    }
}

auth.config

[General]
Username=xx@xx.se
Password=YOUR_PERSONAL_ACCESS_TOKEN