The ProjectId of the billing project for executing jobs.
The ProjectId of the billing project for executing jobs. You can obtain the project Id in the Google APIs console: In the main menu, click API Project and copy the Id. For example: psychic-valve-137816. (Note that your domain name is not part of the Id.)
After connecting to a project, you can determine the other projects accessible to you by querying the Projects view. Set this property to the value of the NumericId field returned by this view.
If this is not set, then the project used for billing will be determined from the first catalog used by the query. For example, in this query the project "psychic-valve-137816" will be billed:
SELECT FirstName, LastName FROM `psychic-valve-137816`.`Northwind`.`customers`