The branch 4.0/obfuscate-currentuser was deleted and repushed:
was f60016be05501cd10d319fd575c78e09c76f4812
now 3c7db05073772e167d6ea4ed31330f320cea72ab
1: f60016b = 1: 3c7db05 Make Obfuscate configuration callback be passed a user as documented