ServiceAccount: A service account in the Identity and Access Management API. To create a service account, you specify the project_id and account_id for the account. The account_id is unique within the project, and used to generate the service account email address and a stable unique id. All other methods can identify accounts using the format "projects/{project}/serviceAccounts/{account}". Using '-' as a wildcard for the project, will infer the project from the account. The account value can be the email address or the unique_id of the service account.