docs: public SignedJWT verifyToken(String jwtString) throws ParseException {
          try {
              SignedJWT jwt = SignedJWT.parse(jwtString);
              if (jwt.verify(new MACVerifier(this.jwtSharedSecret))) {
                  return jwt;
              }
              return null;
          } catch (JOSEException e) {
              throw new RuntimeException("Error verifying JSON Web Token", e);
          }
      }