gistfile1.js

var express = require('express');
var app = express(),
	everyauth = require('everyauth');

everyauth.tumblr
  .consumerKey('')
  .consumerSecret('')
  .findOrCreateUser( function (sess, accessToken, accessSecret, user) {
  	console.log(arguments);
  })
  .redirectPath('/');

app.configure(function(){ 
    app.use(express.bodyParser());
    app.use(express.errorHandler({ dumpExceptions: true, showStack: true }));
    app.use(express.cookieParser());
    app.use(express.session({secret:'abc'}));
    app.use(everyauth.middleware());

});

app.listen(8000);