All classes that implement UserManagerInterface in Open Social 8.3
- class \Drupal\social_auth_extra\UserManager implements UserManagerInterface
- class \Drupal\social_auth_facebook\FacebookUserManager
- class \Drupal\social_auth_google\GoogleUserManager
- class \Drupal\social_auth_linkedin\LinkedInUserManager
- class \Drupal\social_auth_twitter\TwitterUserManager