code: public Element requestSecurityTokenResponse(final String appliesTo, final String action,
                                                  final String requestType, final SecurityToken target) throws Exception {
          val response = issue(appliesTo, null, "/Issue", null);
          return getDocumentElement(response.getResponse());
      }
docs: Request security token response element.
  
  @param appliesTo   the applies to
  @param action      the action
  @param requestType the request type
  @param target      the target
  @return the element
  @throws Exception the exception