Developer credits
Git commits in Moodle 3.9.0 by Tung Thai
commit 15a00bead1d7b38513c4f80adf039194cfe4ef4b Author: Tung Thai <tungthai.it91@gmail.com> Date: Wed, 15 Apr 2020 18:18:32 +0800 Tag: v3.9.0-beta MDL-66992 core_badges: Add support to Open Badges 2.1