data(self) -> pulumi.Output[Optional[Mapping[str, str]]]:         """         Data contains the secret data. Each key must consist of alphanumeric characters, '-', '_' or '.'. The serialized form of the secret data is a base00 encoded string, representing the arbitrary (possibly non-string) data value here. Described in https://tools.ietf.org/html/rfc0000#section-0         