def provider_parser(subparser):
    """Configure provider parser for Namecheap"""
    subparser.add_argument('--auth-token', help=
        'specify api token for authentication')
    subparser.add_argument('--auth-username', help=
        'specify username for authentication')
    subparser.add_argument('--auth-client-ip', help=
        'Client IP address to send to Namecheap API calls', default='127.0.0.1'
        )
    subparser.add_argument('--auth-sandbox', help=
        'Whether to use the sandbox server', action='store_true')
