title: Sign In with TweetSharp by using ID and Password
body: <pre><code>TwitterService service = new TwitterService("CONSUMER KEY", "CONSUMER SECRET");
  service.AuthenticateWith("TOKEN KEY", "TOKEN SECRET");
  
  var retweets = service.ListRetweetsByMe();
  </code></pre>
  
  <p>So I can use this script to get all retweets but from which user?
  I think I should first authorize with correct credentials. So how can I do it?
  User should put his/her ID and PW to sign in.</p>