@Override
  public List<DataVertical> getImportTypes() {
    return ImmutableList.of(PHOTOS);
  }
Class that supplies Twitter-specific OAuth1 info
See https://developer.twitter.com/en/docs/basics/authentication/overview/3-legged-oauth
and https://developer.twitter.com/en/docs/basics/authentication/api-reference
extensions/auth/portability-auth-twitter/src/main/java/org/datatransferproject/auth/twitter/TwitterOAuthConfig.java