Update README.md (#345)

GoogleCloudPlatform · May 11, 2016 · 2f0a79e · 2f0a79e
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diff --git a/managed_vms/endpoints/README.md b/managed_vms/endpoints/README.md
@@ -29,7 +29,7 @@ In your web browser, go to the following address: http://localhost:8080.
 
 With the app running locally, you can execute the simple echo client using:
 
-    $ python clients/echo-client.py http://localhost:8080 APIKEY
+    $ python clients/echo-client.py http://localhost:8080 APIKEY helloworld
 
 The `APIKEY` doesn't matter as the endpoint proxy is not running to do authentication.