https://www.drupal.org/project/social_auth/issues/2866737
Edit USER_FIELDS constant documentation in SocialAuthEvents class [#2866737] | Drupal.org
Apr 18, 2017 - I've found this tiny documentation bug, as PhpStorm was complaining about an illegal array key type, when I used this class constant in a custom event...
edit userfieldsconstantdocumentation