docs: def get_job_by_id(job_id, conn=None):
      """returns the job with the given id
  
      :param job_id: <str> id of the job
      :param conn: <rethinkdb.DefaultConnection>
      :return: <dict> job with the given id
      """
      job = RBJ.get(job_id).run(conn)
      return job