@classmethod<EOL><INDENT>def from_service_account_file(cls, filename, *args, **kwargs):<DEDENT>
credentials = service_account.Credentials.from_service_account_file(<EOL>filename)<EOL>kwargs['<STR_LIT>'] = credentials<EOL>return cls(*args, **kwargs)<EOL>
Creates an instance of this client using the provided credentials
        file.

        Args:
            filename (str): The path to the service account private key json
                file.
            args: Additional arguments to pass to the constructor.
            kwargs: Additional arguments to pass to the constructor.

        Returns:
            dialogflow_v2.SessionsClient: The constructed client.