Generates the *authenticated* link to Roll Call training.
Roll Call training links require authentication. Your browser's address bar - a convenient place to copy the link to a specific course - doesn't include that authentication, and redirects the recipient to log in to Roll Call, refresh, and log in to Roll Call a second (or third!) time. This extension prefixes the Training Object's URL with the authentication link, so that you can copy, paste and send a direct link to a training course (like TR101, or Intro to Chainsaw Operations).