Slack incoming webhook powershell

$webhook = "SLACK INCOMING WEBHOOK URL"

$attachments = @(@{
                    "pretext" = "Lab 7 Smoke Test"
                    "color"="danger"
                    "text"= "14/43 failed (5 mins)"
                })
$payload = 
    @{
        "attachments" = $attachments
        }
        
Invoke-WebRequest `
    -Body (ConvertTo-Json -Compress -InputObject $payload) `
    -Method Post `
    -UseBasicParsing `
    -Uri $webhook | Out-Null