WHOIS API
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      What is the difference between the _hardRefresh and preferFresh flags?

      The difference between _hardRefresh and preferFresh is cache usage. As general rules:

      • If a WHOIS record has an INCOMPLETE_DATA error, it will not be put in cache
      • A WHOIS record is put in cache for 24h (48h for records from whois.godaddy.com)
      • _hardRefresh will force real-time fetch and overwrite the cache yet will cost 5 API credits
      • preferFresh will get you the latest WHOIS record data even if it's incomplete