Bitbucket OAuth consumer example (nodejs w. passport)

login.js

var passport = require('passport'),
  BitbucketStrategy = require('passport-bitbucket').Strategy,
  request = require('request');

module.exports = function (app) {
  var oauth = {
    consumer_key: process.env.BB_CONSUMER_KEY,
    consumer_secret: process.env.BB_CONSUMER_SECRET
  };

  // The Bitbucket authentication strategy authenticates users using
  // a Bitbucket account and OAuth tokens. 
  // The strategy requires a verify callback, which accepts these credentials
  // and calls done providing a user, as well as options specifying
  // a consumer key, consumer secret, and callback URL.
  passport.use(new BitbucketStrategy({
        consumerKey: oauth.consumer_key,
        consumerSecret: oauth.consumer_secret,
        callbackURL: 'http://localhost:5000/auth/bitbucket/callback'
      },
      function(token, tokenSecret, profile, done) {
        var user = profile._json.user;
        oauth.token = token;
        oauth.token_secret = tokenSecret;
        User.findOrCreate(..., function(err, user) {
          // TODO: persist ouath.token and oauth.token_secret
          done(null, user);
        });
      }
    ));
    
    passport.serializeUser(function(user, done) {
      done(null, user.username);
    });

    passport.deserializeUser(function(userId, done) {
      User.find(userId, function(err, user) {
        // TODO: update ouath.token and oauth.token_secret
        done(null, {username: userId});
      });
    });

    // Redirect the user to Bitbucket for authentication.  When
    // complete, it will redirect the user back to the application at
    // /auth/bitbucket/callback
    app.get('/auth/bitbucket', passport.authenticate('bitbucket'));

    // The OAuth provider has redirected the user back to the application.
    // Finish the authentication process by attempting to obtain an access
    // token.  If authorization was granted, the user will be logged in.
    // Otherwise, authentication has failed.
    app.get('/auth/bitbucket/callback', 
      passport.authenticate('bitbucket', { successRedirect: '/',
                                          failureRedirect: '/login' }));

    // Our API to check if user is authenticated
    app.get('/api/login', function(req, res) {
        if (!req.isAuthenticated()) {
            res.send(401);
        } else {
            // Access secure resource
            request.get({url: 'https://api.bitbucket.org/1.0/user/', oauth: oauth},
              function(err, res, json) {
                console.log(err);
                console.log(json);
            });
            res.send(req.user);
        }
    });
};

how will you deal with multiple auth providers? like twitter and linkedin on the same page
var oauth = {
consumer_key: process.env.BB_CONSUMER_KEY,
consumer_secret: process.env.BB_CONSUMER_SECRET
};

@gabhi Use different providers http://passportjs.org/guide/providers/