Session connection to Google Sheet exists for 60 minutes. If someone wanted to keep this for more time then "User Login" option requires re-entering credentials every 60 minutes.
However, we can use the Developer Login0 to bypass this limitation. This method requires sign-in using Google API credentials. This option requires obtaining a Client ID, Client Secret, and Refresh Token and does not require re-entering credentials to run a workflow.
My question - can you address this issue in next release of Alteryx?