Links to info on using service accounts with Terra:
• https://support.terra.bio/hc/en-us/articles/360034540171-How-to-share-a-workspace
• https://github.com/broadinstitute/firecloud-tools/tree/master/scripts/register_service_account
• https://github.com/DataBiosphere/terra-notebook-utils/blob/master/automated_terra_workspace_testing.md#configuring-a-gcp-service-account-with-access-privileges-to-a-terra-workspace
service accounts