Sending Push Notification through PowerShell and Google/Firebase Cloud messaging API

send.ps1

$params = [Hashtable]@{
    "Uri" = "https://fcm.googleapis.com/fcm/send"
    "Method" = "POST"
    "ContentType" = "application/json"
    "Headers" = [Hashtable]@{
        "Authorization" = "key=AAAAWqJ3X..."
    }
    "Body" = (ConvertTo-Json -InputObject (
        [PSCustomObject]@{
            "data"=[PSCustomObject]@{
                "title"="Hello"
                "message"="World"
            }
            "notification" = [PSCustomObject]@{
                "title" = "Breaking News"
                "body" = "New news story available."
                "click_action" = "HANDLE_BREAKING_NEWS"
            }
            "to"="f-X8-Bsg_UsNl0dxPX2dDN:..."
        }))
} 
 #exit 0
Invoke-RestMethod  @params 
# For PSCore/Pwsh use the additional flag `-SkipHeaderValidation`