title: How to get the document object id after insert in reactivemongo?
body: <p>I have seen that this question seems to have been asked earlier (almost 3 years ago), but since then there might be lot of changes in the reactive mongo library. </p>
  
  <p>I am using the play plugin with version 2.4, but the reactivemongo.api.commands.WriteResult does  not seem to have any API to get the document object id.</p>
  
  <p>Now I can start setting the object id by myself, but I do not find it a convincing and right idea since some value unique on the machine where I create the id might not be same with the other machine and to keep things simple I want to let this being handled by mongo db.</p>
  
  <p>So yeah if there is some way that I can get the id of the inserted document will be great or else I have to fallback to the way to setting the id by myself which I something I am trying to avoid.</p>