make a link to a twitter page, and shows the twitter logo instead of the lock symbol like with other external links.

Example: Anduh's twitter profile

{{twitter|anduh_ Anduh's twitter profile}}

You might need to add extra spaces, or the | into the template, if the link text you try to use doesn't work.

Example: Jan 28th Roll20 tweeted about the closed beta being underway, and the open beta would be available "soon". ^tweet

Jan 28th Roll20 tweeted about the closed beta being underway, and the open beta would be available "soon". <sup>{{twitter|roll20app/status/1354617919653752832?s=20 | tweet}}</sup>