USPS-eVS - Void

{
  "carrier": "USPS-eVS",
  "action": "VoidShipment",
  "params": {
    "username": "YOUR_USERNAME",
    "password": "YOUR_PASSWORD",
    "test": true
  }
}

<?php
$rs = new RocketShipIt;
$response = $rs->request(
array (
  'carrier' => 'USPS-eVS',
  'action' => 'VoidShipment',
  'params' => 
  array (
    'username' => 'YOUR_USERNAME',
    'password' => 'YOUR_PASSWORD',
    'test' => true,
  ),
)
);

rs.request(
  {'action': 'VoidShipment',
 'carrier': 'USPS-eVS',
 'params': {'password': 'YOUR_PASSWORD',
            'test': True,
            'username': 'YOUR_USERNAME'}}

)

rs.request(
  {"carrier"=>"USPS-eVS",
 "action"=>"VoidShipment",
 "params"=>
  {"username"=>"YOUR_USERNAME", "password"=>"YOUR_PASSWORD", "test"=>true}}

)

rocketshipit.request(
  {
  "carrier": "USPS-eVS",
  "action": "VoidShipment",
  "params": {
    "username": "YOUR_USERNAME",
    "password": "YOUR_PASSWORD",
    "test": true
  }
}
)