parameters.put(OAuth.OAUTH_CONSUMER_KEY, consumer.getKey());
parameters.put(OAuth.OAUTH_TOKEN, requestToken.getToken());
parameters.put(OAuth.OAUTH_VERIFIER, verifier);
parameters.put(OAuth.OAUTH_SIGNATURE_METHOD, "HMAC-SHA1");
OAuthConsumer oAuthConsumer = new OAuthConsumer(null, consumer.getKey(),
consumer.getSecret(), null);
OAuthAccessor accessor = new OAuthAccessor(oAuthConsumer);
accessor.requestToken = requestToken.getToken();
accessor.tokenSecret = requestToken.getSecret();
return getToken(accessTokenService, accessor, parameters);