@Override
  public List<DataVertical> getExportTypes() {
    return ImmutableList.of(PHOTOS);
  }
Class that supplies Flickr-specific OAuth1 info
See https://www.flickr.com/services/api/auth.oauth.html
extensions/auth/portability-auth-flickr/src/main/java/org/datatransferproject/auth/flickr/FlickrOAuthConfig.java