To add a Twitter widget to your project click + (W) in the widget bar and select Twitter.
Five types of Twitter widget are available: User Timeline, Embed Tweet, Tweet Button, Follow Button, and Hashtag Button. You can use standard Position and Lock controls for all of them.
To embed an existing Twitter profile or quote a particular tweet or timeline choose the corresponding type from the drop-down menu (Embed Timeline or Embed Tweet) and paste the HTML code. Follow How to embed to read about code formatting in Twitter Developer Documentation.