* String username = f.getPrincipal().getName();
     * }
     * The {@code Principal} object returned will never be {@code null}
     * however the username can be {@code null} indication anonymous
     * credentials were used (e.g. some IPC$ services).
     */

    /**
     * Returns the principal used for authentication
     *
     * @return the authentication principal
     */
    public Principal getPrincipal() {

   // Make static controls behave like regular ones\n    .form-control-plaintext {\n      display: inline-block;\n    }\n\n    .input-group,\n    .custom-select {\n      width: auto;\n    }\n\n    // Remove default margin on radios/checkboxes that were used for stacking, and\n    // then undo the floating of radios and checkboxes to match.\n    .form-check {\n      display: flex;\n      align-items: center;\n      justify-content: center;\n      width: auto;\n      padding-left: 0;\n    }\n    .form-check-input...

   // Make static controls behave like regular ones\n    .form-control-plaintext {\n      display: inline-block;\n    }\n\n    .input-group,\n    .custom-select {\n      width: auto;\n    }\n\n    // Remove default margin on radios/checkboxes that were used for stacking, and\n    // then undo the floating of radios and checkboxes to match.\n    .form-check {\n      display: flex;\n      align-items: center;\n      justify-content: center;\n      width: auto;\n      padding-left: 0;\n    }\n    .form-check-input...