$api->submitTracking(array('params' =>
array(
'shop_id' => $shop,
'receipt_id' => $receipt,
'tracking_code' => $code,
'carrier_name' => $carrier,
)));
response
Fatal error: Uncaught Etsy\EtsyRequestException: [1]:### Invalid auth/bad request (got a 411, expected HTTP/1.1 20X or a redirect): Array ( ) <title>Error 411 (Length Required)!!1