title: Mixpanel anonymous user converts to identified user tracking
body: <p>I'm adding Mixpanel to my web application and I'm curious about the "process" around what happens when a user transitions from "anonymous" (not logged in/registered) to "identified" (when they register / create an account on the site).</p>
  
  <p>If a user comes in and is new to the site, they get an anonymous UUID (according to the <a href="https://mixpanel.com/docs/integration-libraries/javascript-full-api#identify">documentation</a>).  The documentation also says that Mixpanel can not translate between IDs at this time. </p>
  
  <p>Does this mean Mixpanel is incapable of handling the transition of a non-registered user to a registered user, and keep track of their events from before they became a registered/identified user?</p>
  
  <p>If so, does anyone have experience with working around this? How'd you go about it?</p>