protected function tearDown()
 {
     $ch = curl_init("https://apidev.printnode.com/test/data/generate");
     curl_setopt($ch, CURLOPT_USERPWD, (string) $this->credentials);
     curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
     curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'DELETE');
     curl_exec($ch);
     curl_close($ch);
     $request = new PrintNode\Request($this->credentials);
     $request->setChildAccountByEmail("*****@*****.**");
     $request->deleteAccount();
     $this->account = null;
     $this->credentials = null;
 }
 * 
 * For this example, you must be authenticated as the Parent Account.
 **/
$credentials->setApiKey(PRINTNODE_APIKEY);
$request = new PrintNode\Request($credentials);
/**
 * You can specify the Child Account to manipulate using any of these methods:
 *  
 * - PrintNode\Request->setChildAccountById($id)
 * - PrintNode\Request->setChildAccountByEmail($email)
 * - PrintNode\Request->setChildAccountByCreatorRef($creatorRef)
 *
 * We will set the Child Account by ID
 **/
$request->setChildAccountById($id);
// All requests from this request object will now operate on this Child Account.
$whoami = $request->getWhoami();
$computers = $request->getComputers();
$printers = $request->getPrinters();
/**
 * We have authenticated using the Parent Account API Key and can therefore 
 * edit Child Acccount details:
 **/
$account = new PrintNode\Account();
// Let's change the Child Account name.
$account->Account = array("firstname" => "ANewFirstName", "lastname" => "ANewLastName");
$request->patch($account);
$whoamiNow = $request->getWhoami();
// Let's delete our Child Account.
$request->deleteAccount();