code: def init_common_services(self, with_cloud_account=True, zone_name=None):
          
          zone_names = ZoneConstants(zone_name)
          type_to_app = lambda t: self.organization.applications[system_application_types.get(t, t)]
          wf_service = self.organization.service(name=zone_names.DEFAULT_WORKFLOW_SERVICE,
                                                 application=type_to_app(WORKFLOW_SERVICE_TYPE),
                                                 environment=self)
          key_service = self.organization.service(name=zone_names.DEFAULT_CREDENTIAL_SERVICE,
                                                  application=type_to_app(COBALT_SECURE_STORE_TYPE),
                                                  environment=self)
          assert wf_service.running()
          assert key_service.running()
          if not with_cloud_account:
              with self as env:
                  env.add_service(wf_service, force=True)
                  env.add_service(key_service, force=True)
              return wf_service, key_service
  
          cloud_account_service = self.organization.instance(name=zone_names.DEFAULT_CLOUD_ACCOUNT_SERVICE,
                                                             application=type_to_app(CLOUD_ACCOUNT_TYPE),
                                                             environment=self,
                                                             parameters=PROVIDER_CONFIG,
                                                             destroyInterval=0)
          # Imidiate adding to env cause CA not to drop destroy interval. Known issue 6132. So, add service as instance with
          # destroyInterval set to 'never'
          assert cloud_account_service.running()
  
          with self as env:
              env.add_service(wf_service, force=True)
              env.add_service(key_service, force=True)
              env.add_service(cloud_account_service, force=True)
          return wf_service, key_service, cloud_account_service
docs: Initialize common service,
          When 'zone_name' is defined " at $zone_name" is added to service names
          :param bool with_cloud_account:
          :param str zone_name:
          :return: OR tuple(Workflow, Vault), OR tuple(Workflow, Vault, CloudAccount) with services