Upated outdated authentication instructions. (GoogleCloudPlatform#1145)

kurtisvg · nnegrey · commit 4105662cb255 · 2018-06-25T08:29:51.000-07:00
diff --git a/language/analysis/README.md b/language/analysis/README.md
@@ -9,14 +9,17 @@ for entity recognition.
 
 [NL-Docs]: https://cloud.google.com/natural-language/docs/
 
-## Java Version
+## Prerequisites
+
+### Java Version
 
 This sample requires you to have
 [Java8](https://docs.oracle.com/javase/8/docs/technotes/guides/install/install_overview.html).
 
 **Note** The Natural Language client is not supported by App Engine Standard.
 
-## Download Maven
+
+### Download Maven
 
 This sample uses the [Apache Maven][maven] build system. Before getting started, be
 sure to [download][maven-download] and [install][maven-install] it. When you use
@@ -27,6 +30,22 @@ libraries.
 [maven-download]: https://maven.apache.org/download.cgi
 [maven-install]: https://maven.apache.org/install.html
 
+### Set Up to Authenticate With Your Project's Credentials
+
+Please follow the [Set Up Your Project](https://cloud.google.com/natural-language/docs/getting-started#set_up_your_project)
+steps in the Quickstart doc to create a project and enable the
+Cloud Natural Language API. Following those steps, make sure that you
+[Set Up a Service Account](https://cloud.google.com/natural-language/docs/common/auth#set_up_a_service_account),
+and export the following environment variable:
+
+```
+export GOOGLE_APPLICATION_CREDENTIALS=/path/to/your-project-credentials.json
+```
+
+[cloud-console]: https://console.cloud.google.com
+[language-api]: https://console.cloud.google.com/apis/api/language.googleapis.com/overview?project=_
+[adc]: https://cloud.google.com/docs/authentication#developer_workflow
+
 ## Run the sample
 
 To build the sample, we use Maven.
