apollo-portal/src/main/java/com/ctrip/framework/apollo/portal/spi/oidc/OidcLogoutHandler.java/OidcLogoutHandler/logout
class OidcLogoutHandler:  @Override
  public void logout(HttpServletRequest request, HttpServletResponse response) {
    try {
      response.sendRedirect(request.getContextPath() + "/logout");
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }