Developer credits
Git commits in Moodle 3.6.x by Frédéric Massart
commit dd815d254f3a5ceb06b5e9b43dc28174c95a9118 Author: Frédéric Massart <fred@branchup.tech> Date: Fri, 20 Oct 2017 17:24:08 +0800 Tag: v3.6.2 MDL-60518 core_user: A user with ID 0 is never a real user