Parses a MongoDB-formatted URI (e.g. mongodb://user:pass@server/db) and returns parsed elements
        and a sanitized URI.

def _parse_uri(cls, server, sanitize_username=False):
        """
        Parses a MongoDB-formatted URI (e.g. mongodb://user:pass@server/db) and returns parsed elements
        and a sanitized URI.
        """
        parsed = pymongo.uri_parser.parse_uri(server)

        username = parsed.get('username')
        password = parsed.get('password')
        db_name = parsed.get('database')
        nodelist = parsed.get('nodelist')
        auth_source = parsed.get('options', {}).get('authsource')

        # Remove password (and optionally username) from sanitized server URI.
        # To ensure that the `replace` works well, we first need to url-decode the raw server string
        # since the password parsed by pymongo is url-decoded
        decoded_server = unquote_plus(server)
        clean_server_name = decoded_server.replace(password, "*" * 5) if password else decoded_server

        if sanitize_username and username:
            username_pattern = u"{}[@:]".format(re.escape(username))
            clean_server_name = re.sub(username_pattern, "", clean_server_name)

        return username, password, db_name, nodelist, clean_server_name, auth_source