Read from a Google Sheet based BigQuery table - Python SDK

[Leonardo Biagioli]

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