Updated key/endpoint

Endpoints are not region-based anymore, but rather custom domain -based. Although regional endpoints will still work. Also, the authentication information is moving to a standard of getting it from environment variables.

Author: wiazur

nodejs/Search/BingSpellCheckv7.js

@@ -2,11 +2,13 @@
 
 let https = require ('https');
 
-let host = 'api.cognitive.microsoft.com';
+// Add your Bing Spell Check endpoint to your environment variables.
+let host = process.env['BING_SPELL_CHECK_ENDPOINT']
 let path = '/bing/v7.0/spellcheck';
 
-/* NOTE: Replace this example key with a valid subscription key (see the Prequisites section above). Also note v5 and v7 require separate subscription keys. */
-let key = 'ENTER KEY HERE';
+// Add your Bing Spell Check subscription key to your environment variables.
+// Also note v5 and v7 require separate subscription keys. 
+let key = process.env['BING_SPELL_CHECK_SUBSCRIPTION_KEY']
 
 // These values are used for optional headers (see below).
 // let CLIENT_ID = "<Client ID from Previous Response Goes Here>";
@@ -47,4 +49,4 @@ let response_handler = function (response) {
 
 let req = https.request (request_params, response_handler);
 req.write ("text=" + text);
-req.end ();
+req.end ();