@Override
  public String getAuthorizationUrl() {
    return "https://secure.smugmug.com/services/oauth/1.0a/authorize";
  }
Class that supplies SmugMug-specific OAuth1 info
See https://api.smugmug.com/api/v2/doc/tutorial/authorization.html
extensions/auth/portability-auth-smugmug/src/main/java/org/datatransferproject/auth/smugmug/SmugMugOAuthConfig.java