def provider_parser(subparser):
    """Specify arguments for AWS Route 53 Lexicon Provider."""
    subparser.add_argument('--auth-access-key', help=
        'specify ACCESS_KEY for authentication')
    subparser.add_argument('--auth-access-secret', help=
        'specify ACCESS_SECRET for authentication')
    subparser.add_argument('--private-zone', help=
        'indicates what kind of hosted zone to use. If true, use only private zones. If false, use only public zones'
        )
    subparser.add_argument('--auth-username', help=
        'alternative way to specify the ACCESS_KEY for authentication')
    subparser.add_argument('--auth-token', help=
        'alternative way to specify the ACCESS_SECRET for authentication')
