index.asciidoc in logstash-input-google_pubsub-1.4.0

- old
+ new

@@ -77,11 +77,12 @@
 ==== Authentication
 
 You have two options for authentication depending on where you run Logstash. 
 
 1. If you are running Logstash outside of Google Cloud Platform, then you will 
-need to create a Google Cloud Platform Service Account and specify the full 
-path to the JSON private key file in your config. You must assign sufficient 
+path to the JSON private key file in your config in `json_key_file` setting.
+If you don't want to upload the file and use its content as a string, then add the content 
+of JSON private key in `json_key_file_content` setting. You must assign sufficient
 roles to the Service Account to create a subscription and to pull messages 
 from the subscription. Learn more about GCP Service Accounts and IAM roles 
 here:
 
   - Google Cloud Platform IAM https://cloud.google.com/iam/[overview]