new_contents: from globus_cli import utils
  
  
  class MissingLoginError(ValueError):
      def __init__(self, missing_servers, *, assume_gcs=False):
          self.missing_servers = missing_servers
          self.assume_gcs = assume_gcs
  
          server_string = utils.format_list_of_words(*missing_servers)
          message_prefix = utils.format_plural_str(
              "Missing {login}",
              {"login": "logins"},
              len(missing_servers) != 1,
          )
  
          login_cmd = "globus login"
          if assume_gcs:
              login_cmd = "globus login " + " ".join(
                  [f"--gcs {s}" for s in missing_servers]
              )
  
          self.message = (
              message_prefix + f" for {server_string}, please run\n\n  {login_cmd}\n"
          )
          super().__init__(self.message)
  
      def __str__(self):
          return self.message
  
subject: Add missing error module