Github user ijokarumawak commented on the issue:
https://github.com/apache/nifi/pull/2577
Discussed about this with @markap14 offline, and we decided to take a
different approach. That is accepting 'null' NiFi user so that NiFi components
can query lineages without needing NiFi user object and authorizations. New PR
#2589 is ready for review.---
