Add an authorization technique to the docs using env vars
[Google Auth](https://github.com/google/google-auth-library-ruby) supports environment varibales as a means of authorizing service apps.
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README.md
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README.md
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@ -214,6 +214,18 @@ result = translate.list_translations('Hello world!', 'es', source: 'en')
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puts result.translations.first.translated_text
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```
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### Authorization using environment variables
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The [GoogleAuth Library for Ruby](https://github.com/google/google-auth-library-ruby) also supports authorization via
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environment variables if you do not want to check in developer credentials
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or private keys. Simply set the following variables for your application:
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```sh
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GOOGLE_ACCOUNT_TYPE="YOUR ACCOUNT TYPE" # ie. 'service'
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GOOGLE_CLIENT_EMAIL="YOUR GOOGLE DEVELOPER EMAIL"
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GOOGLE_PRIVATE_KEY="YOUR GOOGLE DEVELOPER API KEY"
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```
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## Samples
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Samples for versions 0.9 and onward can be found in the `samples` directory.
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