docs(YSP-593): add supporting docs for usage

web/profiles/custom/yalesites_profile/modules/custom/ys_servicenow/README.md

@@ -12,8 +12,29 @@ Features include:
 ## Usage
 
 1. Install the module
-2. Create a new key in the keys module with the ServiceNow endpoint username and password credentials
+2. Create a new key in the keys module with the ServiceNow endpoint username and password credentials (see pantheon secrets below)
 3. Visit the ServiceNow Settings under Configuration
-4. Enable the module and select the key you created
-5. Save
-6. Upon reload, you'll notice a Sync button; click this button to do a manual sync
+4. Enable the module
+5. Select the key you created from the drop down
+6. Enter the endpoint URL you were given by the ServiceNow Team
+   1. Ensure that the following fields are present in the JSON output:
+      1. number: The KB article number
+      2. short_description: The title of the article
+      3. text: The body of the article
+      4. workflow_state: The state of the article (Published, etc)
+7. Save
+8. Upon reload, you'll notice a Sync button; click this button to do a manual sync
+
+The service once turned on will attempt to sync hourly.
+
+## Pantheon Secrets
+
+Pantheon secrets can be used with their Drupal module to interact with the keys module.  To do this you'd want to add a pantheon secret at the site level first with empty data:
+
+`terminus secrets:site:set --scope web,user <siteName> servicenow_auth ""`
+
+From there, you can then specify the multidev specific information.  The key must ultimately be a JSON payload of the following:
+
+`terminus secrets:site:set <siteName>.<env> servicenow_auth '{"username":"username","password":"password"}'`
+
+Then simply sync pantheon secrets in the keys configuration to bring in the key; remember that there is a time delay on when that becomes available for sync.