@Override
 @PUT
 @Path("/workitem/addtouser/{userID}")
 public Response addWorkItemToUser(
     final WorkItem workItem, @PathParam("userID") final String userID) {
   try {
     final User user = ticketSystemService.getUserWithID(userID);
     ticketSystemService.addWorkItemToUser(userID, workItem);
     return Response.status(200).entity(gson.toJson(user)).build();
   } catch (final TicketSystemServiceException exception) {
     return Response.status(400).entity(exception).build();
   }
 }