protected void handle(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException {
        String targetUrl = SecurityUtils.getStartPath(authentication);

        if (response.isCommitted()) {
            return;
        }

        Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();
        if (authorities.contains(new SimpleGrantedAuthority("SUPERVISOR"))) {
            redirectStrategy.sendRedirect(request, response, "/supervisor");
        } else {
            redirectStrategy.sendRedirect(request, response, targetUrl);
        }
    }