|  | @@ -513,7 +513,9 @@ token (created by the project's key file)
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				|  |  |  
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				|  |  |  Test caller should set flag `--service_account_key_file` with the
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				|  |  |  path to json key file downloaded from
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				|  |  | -https://console.developers.google.com.
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				|  |  | +https://console.developers.google.com. Alternately, if using a
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				|  |  | +usable auth implementation, she may specify the file location in the environment
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				|  |  | +variable GOOGLE_APPLICATION_CREDENTIALS.
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				|  |  |  
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				|  |  |  Server features:
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				|  |  |  * [UnaryCall][]
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				|  | @@ -540,7 +542,7 @@ Client asserts:
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				|  |  |  * call was successful
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				|  |  |  * received SimpleResponse.username is not empty and is in the json key file used
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				|  |  |  by the auth library. The client can optionally check the username matches the
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				|  |  | -email address in the key file.
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				|  |  | +email address in the key file or equals the value of `--default_service_account` flag.
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				|  |  |  * response payload body is 314159 bytes in size
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				|  |  |  * clients are free to assert that the response payload body contents are zero
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				|  |  |    and comparing the entire response message against a golden response
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