title: Error: failed to find request token in session
body: <p>I found a few issues on the main passport repo, however, I think this primarily pertains to this specific strategy as I'm able to successfully authenticate using the passport-google-oauth strategy.</p>
  
  <pre><code>Error: failed to find request token in session
      at Strategy.OAuthStrategy.authenticate (/home/glug/application/node_modules/passport-dropbox/node_modules/passport-oauth/lib/passport-oauth/strategies/oauth.js:124:54)
      at attempt (/home/glug/application/node_modules/passport/lib/passport/middleware/authenticate.js:243:16)
      at Passport.authenticate (/home/glug/application/node_modules/passport/lib/passport/middleware/authenticate.js:244:7)
      at callbacks (/home/glug/application/node_modules/express/lib/router/index.js:161:37)
      at param (/home/glug/application/node_modules/express/lib/router/index.js:135:11)
      at pass (/home/glug/application/node_modules/express/lib/router/index.js:142:5)
      at Router._dispatch (/home/glug/application/node_modules/express/lib/router/index.js:170:5)
      at Object.router (/home/glug/application/node_modules/express/lib/router/index.js:33:10)
      at Context.next (/home/glug/application/node_modules/express/node_modules/connect/lib/proto.js:190:15)
      at Context.actions.pass (/home/glug/application/node_modules/passport/lib/passport/context/http/actions.js:77:8)
  </code></pre>
  
  <p>I am using redis as the session store, however, even after eliminating that, it's still failing with the identical error message.</p>
  
  
  
  <pre><code>var DropboxStrategy = require('passport-dropbox').Strategy;
  
  app.configure(function(){
    app.set('port', config.express.port);
    app.use(express.favicon());
    app.use(express.logger('dev'));
    app.use(express.bodyParser());
    app.use(express.methodOverride());
    app.use(express.cookieParser());
          app.use(express.session({
  //        store: new RedisStore({ client: redis}),
          secret: config.express.secret
          }));
          app.use(passport.initialize());
          app.use(passport.session());
    app.use(app.router);
  });
  
  passport.serializeUser(function(user, done) {
  //    console.log('Serializing: ' + JSON.stringify(user));
      done(null, user);
  });
  
  passport.deserializeUser(function(obj, done) {
  //    console.log('Deserializing: ' + obj);
      done(null, obj);
  });
  
  passport.use(new DropboxStrategy({
      consumerKey: config.dropbox.key,
      consumerSecret: config.dropbox.secret,
      callbackURL: config.dropbox.callbackURL
    },
    function(token, tokenSecret, profile, done) {
      // My storage function
      return done(null, profile);
    }
  ));
  </code></pre>
  
  <p>I'm happy to try anything, I've filed an issue on the repo, but I think it may be something I'm doing wrong rather than something wrong with the passport-dropbox repo.</p>