app.js

var passport = require('passport');
var util = require('util');
var GitHubStrategy = require('passport-github').Strategy;

passport.serializeUser(function(user, done) {
  done(null, user);
});

passport.deserializeUser(function(obj, done) {
  done(null, obj);
});

passport.use(new GitHubStrategy({
    clientID: '...',
    clientSecret: '...',
    callbackURL: "http://.../auth/github/callback"
  },
  function(accessToken, refreshToken, profile, done) {
    process.nextTick(function () {
      return done(null, profile);
    });
  }
));


app.use(express.session({ secret: '...' }));
app.use(passport.initialize());
app.use(passport.session());


app.get('/auth/github',
  passport.authenticate('github'),
  function(req, res){
    // The request will be redirected to GitHub for authentication, so this
    // function will not be called.
  });

error

{ [error: invalid input syntax for integer: "auth"]
  name: 'error',
  length: 86,
  severity: 'ERROR',
  code: '22P02',
  detail: undefined,
  hint: undefined,
  position: undefined,
  internalPosition: undefined,
  internalQuery: undefined,
  where: undefined,
  file: 'numutils.c',
  line: '62',
  routine: 'pg_atoi' }