code: def get_seed_users(self):
          
          seed_users = super(MongodServer, self).get_seed_users()
          # exempt database users for config servers
          if seed_users and self.is_config_server():
              for dbname in seed_users.keys():
                  if dbname not in ["admin", "local", "config"]:
                      del seed_users[dbname]
  
          return seed_users
docs: Override!
          :return: