message: use email if display_name is null from OAuth provider
diff: @@ -69,7 +69,7 @@ const manageProviderStrategy = (
  account_roles: {
  data: [{ role: DEFAULT_USER_ROLE }]
  },
  - user: { data: { display_name, avatar_url } },
  + user: { data: { display_name: display_name || email, avatar_url } },
  account_providers: {
  data: [
  {
  