title: multer configuration with app.use returns TypeError
body: <p>I'm trying to configure multer in my app.js file (using node.js/express) in order to allow users to upload images. I have the following code in app.js:</p>
  
  <pre><code>//various require statements for passport, cookie parser, etc..
  
  var multer = require('multer');
  
  var app = express();
  
  app.use(multer({dest:'./uploads/'}));
  </code></pre>
  
  <p>When I try to run the app I get <code>TypeError: app.use() requires middleware functions</code></p>
  
  <p>I understand that this questions may require some more context with regards to my app so please let me know if additional information is needed.</p>
  
  <p>Thank you</p>
  
  <p>EDIT: More code from app.js:</p>
  
  <pre><code>var express = require('express');
  var path = require('path');
  var favicon = require('serve-favicon');
  var logger = require('morgan');
  var bodyParser = require('body-parser');
  var methodOverride = require('method-override');
  var session = require('express-session');
  //var fs = require('fs');
  var multer = require('multer');
  
  //Mongo Database
  var mongo = require('mongodb');
  var monk = require('monk');
  var db = monk('localhost:27017/test-api');
  
  //Instagram-API
  var api = require('instagram-node').instagram();
  
  //Cookie Manager
  var cookieParser = require('cookie-parser');
  
  //Grid
  //var Grid = require('gridfs-stream');
  
  //Passport
  var passport = require('passport');
  var InstagramStrategy = require('passport-instagram').Strategy;
  
  var routes = require('./routes/index');
  //var users = require('./routes/users');
  
  var app = express();
  
  // view engine setup
  app.set('views', path.join(__dirname, 'views'));
  app.set('view engine', 'jade');
  
  // uncomment after placing your favicon in /public
  //app.use(favicon(__dirname + '/public/favicon.ico'));
  app.use(logger('dev'));
  app.use(multer({dest:'./uploads/'}));
  app.use(bodyParser.json());
  app.use(bodyParser.urlencoded({ extended: false }));
  app.use(cookieParser());
  app.use(methodOverride());
  app.use(session({secret: 'keyboard cat', resave: false, saveUninitialized: true }));
  app.use(passport.initialize());
  app.use(passport.session());
  app.use(express.static(path.join(__dirname, 'public')));
  
  
  // Make our db accessible to our router
  app.use(function(req,res,next){
      req.db = db;
      next();
  });
  
  app.use('/', routes);
  </code></pre>