GetAPIData.ps1

$AppId           = ""
$Client_Secret   = ""
$TokenURL        = ""  # Example: https://www.example.com/oauth2/token
$Hostname        = ""  # Example: https://www.example.com/
$RequestBasePath = ""  # Example: api/config/v1
$APIPath         = ""  # Example: /users

$Body = @{
    client_id     = $AppId
    client_secret = $Client_Secret
    grant_type    = "client_credentials"
}

try { 
    Write-Output "Getting API Auth Token"
    $TokenRequest = Invoke-WebRequest -Method Post -Uri $TokenURL -ContentType "application/x-www-form-urlencoded" -Body $Body -UseBasicParsing -ErrorAction Stop }
catch { Write-Output "Unable to obtain access token, moving on..."}

if ($TokenRequest){
    $Token = ($tokenRequest.Content | ConvertFrom-Json).access_token

    $AuthHeader1 = @{
    'Content-Type'='application\json'
    'Authorization'="Bearer $Token"
    }
    $URL=($Hostname+$RequestBasePath+$APIPath)
    $RequestContent = (Invoke-WebRequest -Headers $AuthHeader1 -Uri $URL -Method GET).Content | ConvertFrom-Json
    }

if ($RequestContent){
        $RequestContent | Out-gridview
        }