title: GET 400 (Bad Request) with node in js
body: <p>I have this js</p>
  
  <pre><code>    var https = require('https');
  
      var contador =process.argv[2]?process.argv[2]:'...';
      var screen_name =process.argv[3]?process.argv[3]:'...';
      var user_id =process.argv[4]?process.argv[4]:'...';
  
      var options = {
          host: 'api.twitter.com',
          path: '/1.1/followers/ids.json/count/'+contador+'/screen_name/'+screen_name+'/user_id/'+user_id,
          method: 'GET'
      };
  var req = https.request(options, function(res) {
      console.log('Response is '+res.statusCode);
                           res.setEncoding('utf8');
                           res.on('data', function (datos_JSON) {
                                   var datos=JSON.parse(datos_JSON);
                   });
  
   });
  </code></pre>
  
  <p>req.end();</p>
  
  <p>and I get the following error, response 400, why?...</p>