Allow Blacklisting also

[shahidmau]

Is there any way to allow blacklisting instead of whitelisting, so we will mention the fields name to be masked and remaining fields will not be masked.

[sergiv83]

@shahidmau We thought about this feature and decided to not add it to the lib. It's potentially dangerous. In the case of typo or misconfiguration with the whitelisting approach, you'll have the field masked and will not see the original value. In contrast to that with the blacklisting approach, the value can appear unmasked. It can bring lots of problems. For example, we stored our logs to the 3-rd party service for aggregation and had to be sure that customer PI information will not appear unmasked in these logs for any case.