code: public synchronized void authenticate(final String consumerKey, final String consumerSecret, final TwitterAuthListener listener)  {
  		
  		TwitterOAuthProvider provider = newTwitterOAuthProvider();
  		CommonsHttpOAuthConsumer consumer = newCommonsHttpOAuthConsumer(consumerKey, consumerSecret);
  		OAuthRequestListener oAuthRequestListener = newOAuthRequestListener(listener, provider, consumer);
  		
  		twitterWebViewClient.setOauthRequestListener(oAuthRequestListener);
  		
  		provider.retrieveRequestTokenAsync(consumer, TwitterOAuthProvider.OAUTH_CALLBACK_URL, newOAuthRequestTokenUrlListener(listener));
  	}
docs: Starts the authentication process using the given twitter key/secret.
  @param consumerKey
  @param consumerSecret