Redact password in urls.

def sanitize_url(url):
    """Redact password in urls."""
    parts = urlparse(url)
    if parts.password is None:
        return url
    host_info = parts.netloc.rsplit('@', 1)[-1]
    parts = parts._replace(netloc='{}:{}@{}'.format(
        parts.username, REDACTED, host_info))
    return parts.geturl()