See following regarding authenticating Dataflow jobs.
https://cloud.google.com/dataflow/security-and-permissions

I'm not sure about information specific to sheets, seems like there's some
info in following.
https://cloud.google.com/bigquery/external-data-drive

On Tue, Jun 5, 2018 at 10:16 AM Leonardo Biagioli <[email protected]>
wrote:

> Hi Cham,
> Thank you for taking time to answer!
> Is there a way to authenticate properly a Beam job on Dataflow runner? I
> should specify the required scope to read from Sheets, but where I can set
> that parameter?
> Regards,
> Leonardo
>
> Il 05 giu 2018 18:28, Chamikara Jayalath <[email protected]> ha
> scritto:
>
> I don't think BQ federated tables support export jobs so reading directly
> from such tables likely will not work. But reading using a query should
> work if your job is authenticated properly  (I haven't tested this).
>
> - Cham
>
>
> On Tue, Jun 5, 2018, 5:56 AM Leonardo Biagioli <[email protected]>
> wrote:
>
> Hi guys,
>
> just wanted to ask you if there is a chance to read from a Sheet based
> BigQuery table from a Beam pipeline running on Dataflow…
>
> I usually specify additional scopes to use through the authentication when
> running simple Python code to do the same, but I wasn’t able to find a
> reference to something similar for Beam.
>
> Could you please help?
>
> Thank you very much!
>
> Leonardo
>
>
>

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