docs(language translator, visual recognition): Use IAM auth in README

lpatino10 · lpatino10 · commit fe993805dea1 · 2018-06-12T15:52:08.000-04:00
diff --git a/language-translator/README.md b/language-translator/README.md
@@ -22,7 +22,10 @@ Example: Translate 'hello' from English to Spanish using the [Language Translato
 
 ```java
 LanguageTranslator service = new LanguageTranslator();
-service.setUsernameAndPassword("<username>", "<password>");
+IamOptions iamOptions = new IamOptions.Builder()
+  .apiKey("<iam_api_key>")
+  .build();
+service.setIamCredentials(iamOptions);
 
 TranslateOptions translateOptions = new TranslateOptions.Builder()
   .addText("hello")
diff --git a/visual-recognition/README.md b/visual-recognition/README.md
@@ -24,7 +24,10 @@ following picture.
 
 ```java
 VisualRecognition service = new VisualRecognition("2016-05-20");
-service.setApiKey("<api-key>");
+IamOptions iamOptions = new IamOptions.Builder()
+  .apiKey("<iam_api_key>")
+  .build();
+service.setIamCredentials(iamOptions);
 
 System.out.println("Classify an image");
 ClassifyOptions options = new ClassifyOptions.Builder()
