docs: public VerificationKeysListResponse getKeys(Principal principal) {
          boolean includeSymmetric = includeSymmetricalKeys(principal);
          Map<String, KeyInfo> keys = keyInfoService.getKeys();
          List<VerificationKeyResponse> keyResponses = keys.values().stream()
                  .filter(k -> includeSymmetric || RSA.name().equals(k.type()))
                  .map(TokenKeyEndpoint::getVerificationKeyResponse)
                  .collect(Collectors.toList());
          return new VerificationKeysListResponse(keyResponses);
      }