how to use this source process order?

[juragandotid]

can u give me an example step to make order using this source?

search product -> getproductID -> checkout product -> guestcheckout -> payment -> suceess or failed.

[juragandotid]

this is my script for first initiate checkout session :

`<?php

/**

• Copyright 2016 David T. Sadler
• Licensed under the Apache License, Version 2.0 (the "License");
• you may not use this file except in compliance with the License.
• You may obtain a copy of the License at
• http://www.apache.org/licenses/LICENSE-2.0
• Unless required by applicable law or agreed to in writing, software
• distributed under the License is distributed on an "AS IS" BASIS,
• WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
• See the License for the specific language governing permissions and
• limitations under the License.
  */

/**

• Include the SDK by using the autoloader from Composer.
  */
  require_once'vendor/autoload.php';

/**

• Include the configuration values.
• Ensure that you have edited the configuration.php file
• to include your application keys.
  */
  $config = require_once 'config.php';

/**

• The namespaces provided by the SDK.
  */
  use \DTS\eBaySDK\Order\Services;
  use \DTS\eBaySDK\Order\Types;
  use \DTS\eBaySDK\Order\Enums;

$service = new Services\OrderService([
'credentials' => $config['production']['credentials']
]);

/**

• Create the request object.
  */
  $request = new Types\InitiateGuestCheckoutSessionRestRequest();

$request->contactEmail = 'nike.yogesh@gmail.com';
$request->contactFirstName = 'Yogesh';
$request->contactLastName = 'Naik';
$request->shippingAddress->recipient = 'Yogesh Naik';
$request->shippingAddress->phoneNumber = '617 817 7449 ';
$request->shippingAddress->addressLine1 = '600 Epic Way #566';
$request->shippingAddress->city = 'San Jose';
$request->shippingAddress->stateOrProvince = 'CA';
$request->shippingAddress->postalCode = '95134';
$request->shippingAddress->country = 'US';
$request->lineItemInputs->quantity = '1';
$request->lineItemInputs->itemId = 'v1|330008507440|0';

$response = $service->initiateGuestCheckoutSession($request);

/**

• Output the result of calling the service operation.
  */
  if (isset($response->Errors)) {
  foreach ($response->Errors as $error) {
  printf(
  "%s: %s\n%s\n\n",
  $error->SeverityCode === Enums\SeverityCodeType::C_ERROR ? 'Error' : 'Warning',
  $error->ShortMessage,
  $error->LongMessage
  );
  }
  }

if ($response->Ack !== 'Failure') {

$SessionId = $response->checkoutSessionId;
print($SessionId);

}`

and i got this error respon :

`PHP Fatal error: Uncaught InvalidArgumentException: Missing required configuration options:

authorization in F:\ebay\vendor\dts\ebay-sdk-php\src\ConfigurationResolver.php:145
Stack trace:
#0 F:\ebay\vendor\dts\ebay-sdk-php\src\ConfigurationResolver.php(52): DTS\eBaySDK\ConfigurationResolver->throwRequired(Array)
#1 F:\ebay\vendor\dts\ebay-sdk-php\src\Services\BaseRestService.php(53): DTS\eBaySDK\ConfigurationResolver->resolve(Array)
#2 F:\ebay\vendor\dts\ebay-sdk-php\src\Order\Services\OrderBaseService.php(37): DTS\eBaySDK\Services\BaseRestService->__construct(Array)
#3 F:\ebay\vendor\dts\ebay-sdk-php\src\Order\Services\OrderService.php(196): DTS\eBaySDK\Order\Services\OrderBaseService->__construct(Array)
#4 F:\ebay\initiateGuestCheckoutSession.php(40): DTS\eBaySDK\Order\Services\OrderService->__construct(Array)
#5 {main}
thrown in F:\ebay\vendor\dts\ebay-sdk-php\src\ConfigurationResolver.php on line 145

Fatal error: Uncaught InvalidArgumentException: Missing required configuration options:

authorization in F:\ebay\vendor\dts\ebay-sdk-php\src\ConfigurationResolver.php:145
Stack trace:
#0 F:\ebay\vendor\dts\ebay-sdk-php\src\ConfigurationResolver.php(52): DTS\eBaySDK\ConfigurationResolver->throwRequired(Array)
#1 F:\ebay\vendor\dts\ebay-sdk-php\src\Services\BaseRestService.php(53): DTS\eBaySDK\ConfigurationResolver->resolve(Array)
#2 F:\ebay\vendor\dts\ebay-sdk-php\src\Order\Services\OrderBaseService.php(37): DTS\eBaySDK\Services\BaseRestService->__construct(Array)
#3 F:\ebay\vendor\dts\ebay-sdk-php\src\Order\Services\OrderService.php(196): DTS\eBaySDK\Order\Services\OrderBaseService->__construct(Array)
#4 F:\ebay\initiateGuestCheckoutSession.php(40): DTS\eBaySDK\Order\Services\OrderService->__construct(Array)
#5 {main}
thrown in F:\ebay\vendor\dts\ebay-sdk-php\src\ConfigurationResolver.php on line 145`

Thank you.