writerIdentity

A service account name for exporting the data. This field is set by sinks.create and sinks.update. The service account will need to be granted write access to the destination specified in the output configuration, see /iam/docs/granting-roles-to-service-accounts#granting_access_to_a_service_account_for_a_resource. To create tables and to write data, this account needs the dataEditor role. Read more about roles in the BigQuery documentation. E.g.: "service-00000001@00000002.iam.gserviceaccount.com"