docs: def purge_network(network_id, purge_data,**kwargs):
      """
          Remove a network from DB completely
          Use purge_data to try to delete the data associated with only this network.
          If no other resources link to this data, it will be deleted.
  
      """
      user_id = kwargs.get('user_id')
      try:
          net_i = db.DBSession.query(Network).filter(Network.id == network_id).one()
      except NoResultFound:
          raise ResourceNotFoundError("Network %s not found"%(network_id))
  
      log.info("Deleting network %s, id=%s", net_i.name, network_id)
  
      net_i.check_write_permission(user_id)
      db.DBSession.delete(net_i)
      db.DBSession.flush()
      return 'OK'