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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 postman(host, port=587, auth=(None, None), force_tls=False, options=None):
 """ Creates a Postman object with TLS and Auth middleware. TLS is placed before authentication because usually authentication happens and is accepted only after TLS is enabled. :param auth: Tuple of (username, password) to be used to ``login`` to the server. :param force_tls: Whether TLS should be forced. :param options: Dictionary of keyword arguments to be used when the SMTP class is called. """

    return Postman(
        host=host,
        port=port,
        middlewares=[
            middleware.tls(force=force_tls),
            middleware.auth(*auth),
        ],
        **options
    )