code: def notify_users(cursor, document_id):
      
      return
  
      registry = get_current_registry()
      accounts = registry.getUtility(IOpenstaxAccounts)
      cursor.execute("""\
  SELECT la.user_id
  FROM license_acceptances AS la
  WHERE
    la.uuid = (SELECT uuid FROM pending_documents WHERE id = %s)
    AND la.notified IS NULL AND (NOT la.accepted or la.accepted IS UNKNOWN)
  """, (document_id,))
      licensors = [x[0] for x in cursor.fetchall()]
  
      cursor.execute("""\
  SELECT user_id, array_agg(role_type)::text[]
  FROM role_acceptances AS ra
  WHERE
    ra.uuid = (SELECT uuid FROM pending_documents WHERE id = %s)
    AND ra.notified IS NULL AND (NOT ra.accepted or ra.accepted IS UNKNOWN)
  GROUP BY user_id
  """, (document_id,))
      roles = {u: r for u, r in cursor.fetchall()}
  
      needs_notified = set(licensors + roles.keys())
  
      for user_id in needs_notified:
          data = {
              'user_id': user_id,
              'full_name': None,  # TODO
              'licensor': user_id in licensors,
              'roles': roles.get(user_id, []),
          }
          message = NOTIFICATION_TEMPLATE.render(**data)
          accounts.send_message(user_id, NOFIFICATION_SUBJECT, message)
  
      cursor.execute("""\
  UPDATE license_acceptances SET notified = CURRENT_TIMESTAMP
  WHERE
    uuid = (SELECT uuid FROM pending_documents WHERE id = %s)
    AND user_id = ANY (%s)""", (document_id, licensors,))
      # FIXME overwrites notified for all roles types a user might have.
      cursor.execute("""\
  UPDATE role_acceptances SET notified = CURRENT_TIMESTAMP
  WHERE
    uuid = (SELECT uuid FROM pending_documents WHERE id = %s)
    AND user_id = ANY (%s)""", (document_id, roles.keys(),))
docs: Notify all users about their role and/or license acceptance
      for a piece of content associated with the given ``document_id``.