code: def find_in_mailbox(cls, session, mailbox_or_id):
          
          if hasattr(mailbox_or_id, 'id'):
              mailbox_or_id = mailbox_or_id.id
          return cls(
              '/mailboxes/%d/users.json' % mailbox_or_id,
              session=session,
          )
docs: Get the users that are associated to a Mailbox.
  
          Args:
              session (requests.sessions.Session): Authenticated session.
              mailbox_or_id (MailboxRef or int): Mailbox of the ID of the
                  mailbox to get the folders for.
  
          Returns:
              RequestPaginator(output_type=helpscout.models.User): Users
                  iterator.