code: @Override
      protected void internalInit() {
          this.service = new GlobusOAuth20ServiceImpl(new GlobusApi(),
                  new OAuthConfig(this.key, this.secret, this.callbackUrl,
                          SignatureType.Header, "user", null), this.proxyHost,
                  this.proxyPort);
      }
docs: Initializes the signing of Globus API calls with an access token. A
  superclass that overrides this method must call this method in the
  overridden version, or you must override {@link #sendRequestForData(org.scribe.model.Token, java.lang.String) }
  with a new implementation.