+* Enable the Contacts and Google+ APIs.
+* Create an OAuth Client ID for a web application.
+** JavaScript origins: @https://sso.example.com/@
+** Redirect URIs: @https://sso.example.com/auth/google_oauth2/callback@
+
+Copy the "Client ID" and "Client secret" values from the Google Developers Console into the Google section of @config/application.yml@, like this:
+
+<notextile>
+<pre><code>