The resource name of the billing account. The resource name has the form billingAccounts/{billing_account_id}. For example, billingAccounts/012345-567890-ABCDEF would be the resource name for billing account 012345-567890-ABCDEF.
billingAccounts/{billing_account_id}
billingAccounts/012345-567890-ABCDEF
012345-567890-ABCDEF