How to use the openid.claimed_id function in openid

var _verifyDiscoveredInformation = function(params, stateless, extensions, strict, callback)
{
  var claimedIdentifier = params['openid.claimed_id'];
  var useLocalIdentifierAsKey = false;
  if(!_isDef(claimedIdentifier))
  {
    if(!_isDef(params['openid.ns']))
    {
      // OpenID 1.0/1.1 response without a claimed identifier
      // We need to load discovered information using the
      // local identifier
      useLocalIdentifierAsKey = true;
    }
    else {
      // OpenID 2.0+:
      // If there is no claimed identifier, then the
      // assertion is not about an identity
      return callback(null, { authenticated: false }); 
      }

if(provider.claimedIdentifier)
  {
    params['openid.claimed_id'] = provider.claimedIdentifier;
    if(provider.localIdentifier)
    {
      params['openid.identity'] = provider.localIdentifier;
    }
    else
    {
      params['openid.identity'] = provider.claimedIdentifier;
    }
  }
  else if(provider.version.indexOf('2.0') !== -1)
  {
    params['openid.claimed_id'] = params['openid.identity'] =
      'http://specs.openid.net/auth/2.0/identifier_select';
  }
  else {
    return callback({ message: 'OpenID 1.0/1.1 provider cannot be used without a claimed identifier' });
  }

  if(assoc_handle)
  {
    params['openid.assoc_handle'] = assoc_handle;
  }

  if(returnUrl)
  {
    // Value should be missing if RP does not want
    // user to be sent back
    params['openid.return_to'] = returnUrl;

app.get('/go', function(request, res) {
    'use strict';
    console.log("In Go Callback");
    var query = request.query;
    console.log(query);
    console.log(query['openid.claimed_id']);
    relyingParty.verifyAssertion(request, function(error, result) {
        var isGood = !error &amp;&amp; result.authenticated ? '<h1>Success!</h1>' : '<h1>Failed</h1>';
        res.writeHead(200, {
            'Content-Type': 'text/html'
        });
        res.write(isGood);
        res.write('<p>' + query['openid.assoc_handle'] + '</p>');
        res.write('<p>' + query['openid.claimed_id'] + '</p>');
        res.write('<p>' + query['openid.identity'] + '</p>');
        res.write('<p>' + query['openid.mode'] + '</p>');
        res.write('<p>' + query['openid.ns'] + '</p>');
        res.write('<p>' + query['openid.op_endpoint'] + '</p>');
        res.write('<p>' + query['openid.response_nonce'] + '</p>');
        res.write('<p>' + query['openid.return_to'] + '</p>');
        res.write('<p>' + query['openid.sig'] + '</p>');
        res.write('<p>' + query['openid.signed'] + '</p>');

var param = signedParams[i];
      var value = params['openid.' + param];
      if(!_isDef(value))
      {
        return callback({ message: 'At least one parameter referred in signature is not present in response' }, { authenticated: false });
      }
      message += param + ':' + value + '\n';
    }

    var hmac = crypto.createHmac(association.type, _fromBase64(association.secret));
    hmac.update(message, 'utf8');
    var ourSignature = hmac.digest('base64');

    if(ourSignature == params['openid.sig'])
    {
      callback(null, { authenticated: true, claimedIdentifier: association.provider.version.indexOf('2.0') !== -1 ? params['openid.claimed_id'] : association.provider.claimedIdentifier });
    }
    else
    {
      callback({ message: 'Invalid signature' }, { authenticated: false });
    }
  });
}

if(!hasOwnProperty(extensions, i))
    {
      continue;
    }

    var extension = extensions[i];
    for (var key in extension.requestParams)
    {
      if (!hasOwnProperty(extension.requestParams, key)) { continue; }
      params[key] = extension.requestParams[key];
    }
  }

  if(provider.claimedIdentifier)
  {
    params['openid.claimed_id'] = provider.claimedIdentifier;
    if(provider.localIdentifier)
    {
      params['openid.identity'] = provider.localIdentifier;
    }
    else
    {
      params['openid.identity'] = provider.claimedIdentifier;
    }
  }
  else if(provider.version.indexOf('2.0') !== -1)
  {
    params['openid.claimed_id'] = params['openid.identity'] =
      'http://specs.openid.net/auth/2.0/identifier_select';
  }
  else {
    return callback({ message: 'OpenID 1.0/1.1 provider cannot be used without a claimed identifier' });

relyingParty.verifyAssertion(request, function(error, result) {
        var isGood = !error &amp;&amp; result.authenticated ? '<h1>Success!</h1>' : '<h1>Failed</h1>';
        res.writeHead(200, {
            'Content-Type': 'text/html'
        });
        res.write(isGood);
        res.write('<p>' + query['openid.assoc_handle'] + '</p>');
        res.write('<p>' + query['openid.claimed_id'] + '</p>');
        res.write('<p>' + query['openid.identity'] + '</p>');
        res.write('<p>' + query['openid.mode'] + '</p>');
        res.write('<p>' + query['openid.ns'] + '</p>');
        res.write('<p>' + query['openid.op_endpoint'] + '</p>');
        res.write('<p>' + query['openid.response_nonce'] + '</p>');
        res.write('<p>' + query['openid.return_to'] + '</p>');
        res.write('<p>' + query['openid.sig'] + '</p>');
        res.write('<p>' + query['openid.signed'] + '</p>');
        res.end('bye');
    });
});

var param = signedParams[i];
      var value = params['openid.' + param];
      if(!_isDef(value))
      {
        return callback({ message: 'At least one parameter referred in signature is not present in response' }, { authenticated: false });
      }
      message += param + ':' + value + '\n';
    }

    var hmac = crypto.createHmac(association.type, _buffer(association.secret, 'base64'));
    hmac.update(message, 'utf8');
    var ourSignature = hmac.digest('base64');

    if(ourSignature == params['openid.sig'])
    {
      callback(null, { authenticated: true, claimedIdentifier: association.provider.version.indexOf('2.0') !== -1 ? params['openid.claimed_id'] : association.provider.claimedIdentifier });
    }
    else
    {
      callback({ message: 'Invalid signature' }, { authenticated: false });
    }
  });
}

if(!extensions.hasOwnProperty(i))
    {
      continue;
    }

    var extension = extensions[i];
    for (var key in extension.requestParams)
    {
      if (!extension.requestParams.hasOwnProperty(key)) { continue; }
      params[key] = extension.requestParams[key];
    }
  }

  if(provider.claimedIdentifier)
  {
    params['openid.claimed_id'] = provider.claimedIdentifier;
    if(provider.localIdentifier)
    {
      params['openid.identity'] = provider.localIdentifier;
    }
    else
    {
      params['openid.identity'] = provider.claimedIdentifier;
    }
  }
  else if(provider.version.indexOf('2.0') !== -1)
  {
    params['openid.claimed_id'] = params['openid.identity'] =
      'http://specs.openid.net/auth/2.0/identifier_select';
  }
  else {
    return callback({ message: 'OpenID 1.0/1.1 provider cannot be used without a claimed identifier' });