Amazon - Void Shipment

{
  "carrier": "amazon",
  "action": "voidshipment",
  "params": {
    "client_id": "amzn1.application-oa2-client.abc123",
    "client_secret": "your-client-secret",
    "refresh_token": "Atzr|your-refresh-token",
    "application_id": "AmazonShipping_US",
    "shipment_id": "your-shipment-id"
  }
}

<?php
$rs = new RocketShipIt;
$response = $rs->request(
array (
  'carrier' => 'amazon',
  'action' => 'voidshipment',
  'params' => 
  array (
    'client_id' => 'amzn1.application-oa2-client.abc123',
    'client_secret' => 'your-client-secret',
    'refresh_token' => 'Atzr|your-refresh-token',
    'application_id' => 'AmazonShipping_US',
    'shipment_id' => 'your-shipment-id',
  ),
)
);

rs.request(
  {'action': 'voidshipment',
 'carrier': 'amazon',
 'params': {'application_id': 'AmazonShipping_US',
            'client_id': 'amzn1.application-oa2-client.abc123',
            'client_secret': 'your-client-secret',
            'refresh_token': 'Atzr|your-refresh-token',
            'shipment_id': 'your-shipment-id'}}

)

rs.request(
  {"carrier"=>"amazon",
 "action"=>"voidshipment",
 "params"=>
  {"client_id"=>"amzn1.application-oa2-client.abc123",
   "client_secret"=>"your-client-secret",
   "refresh_token"=>"Atzr|your-refresh-token",
   "application_id"=>"AmazonShipping_US",
   "shipment_id"=>"your-shipment-id"}}

)

rocketshipit.request(
  {
  "carrier": "amazon",
  "action": "voidshipment",
  "params": {
    "client_id": "amzn1.application-oa2-client.abc123",
    "client_secret": "your-client-secret",
    "refresh_token": "Atzr|your-refresh-token",
    "application_id": "AmazonShipping_US",
    "shipment_id": "your-shipment-id"
  }
}
)