code: public String getAuthorizationUrl(OAuth1RequestToken oAuthRequestToken, Permission permission) {
  
          OAuth10aService service = new ServiceBuilder(apiKey)
                  .apiSecret(sharedSecret)
                  .build(FlickrApi.instance());
          String authorizationUrl = service.getAuthorizationUrl(oAuthRequestToken);
          return String.format("%s&perms=%s", authorizationUrl, permission.toString());
      }
docs: Get the auth URL, this is step two of authorization.
  
  @param oAuthRequestToken
  the token from a {@link AuthInterface#getRequestToken} call.