Make a request to the resource extension using a REST client and get "Hello World" back.

1. Using a REST client, log into the demo store by following the instructions here: http://api-cortex-developers.docs.elasticpath.com/drupal/content/Generate_a_token_to_access_public_resources
2. Enter the following fields in your REST client to make a GET request to the helloworld resource:

   HTTP Request Method	URL	Header
   GET
   https://localhost:8443/cortex/helloworld/
   Content-type: Application/json

   The response you get should have the following content:

   {
     "self": {
       "type": "application/vnd.mycompany.helloworld",
       "uri": "/commerce-legacy/helloworld",
       "href": "https://localhost:8443/cortex/helloworld",
       "max-age": 0
     },
     "message": "Hello World""links": [],
   }