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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def find_in_mailbox(cls, session, mailbox_or_id):
 """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. """

        if hasattr(mailbox_or_id, 'id'):
            mailbox_or_id = mailbox_or_id.id
        return cls(
            '/mailboxes/%d/users.json' % mailbox_or_id,
            session=session,
        )