docs: faq: link to Auth guide to dedupe steps

docs/faq.md

@@ -4,17 +4,7 @@ If you are running this client on Google Compute Engine, we handle authorization
 
 ## I'm not using Compute Engine. What do I need to do?
 
-If you are not running this client on Google Compute Engine, you need a Google Developers service account. To create a service account:
-
-1. Visit the [Google Developers Console][dev-console].
-2. Create a new project or click on an existing project.
-3. Navigate to  **APIs & auth** > **APIs section** and turn on the following APIs (you may need to enable billing in order to use these services):
-    * Google Cloud Datastore API
-    * Google Cloud Storage
-    * Google Cloud Storage JSON API
-4. Navigate to **APIs & auth** >  **Credentials** and then:
-    * If you want to use a new service account, click on **Create new Client ID** and select **Service account**. After the account is created, you will be prompted to download the JSON key file that the library uses to authorize your requests.
-    * If you want to generate a new key for an existing service account, click on **Generate new JSON key** and download the JSON key file.
+If you are not running this client on Google Compute Engine, you need a Google Developers service account. To create a service account, please see our [Authorization][auth-guide] guide.
 
 ## Does this replace [Google Cloud Node.js Client][googleapis]?
 
@@ -23,3 +13,4 @@ Google Cloud Node.js Client is a client library for using the broad set of Googl
 [dev-console]: https://console.developers.google.com/project
 [gce-how-to]: https://developers.google.com/compute/docs/authentication#using
 [googleapis]: https://github.com/google/google-api-nodejs-client
+[auth-guide]: #/authorization