title: Failed login session when using twitter-connect plugin with Ionic2
body: <p>i'v try using twitter connect plugin but it does't work 
  i'v error <code>failed login session</code>
  i'v also get fabric key 
  so any solution for this to get twitter authentication and login with it.
  this is my code:</p>
  
  <pre><code>loginWithTwitter(){
  
    this.tw.login().then(function(result) {
      console.log(result);
      //Get user data
      this.tw.showUser().then(function(user){
        //Save the user data in NativeStorage
  
        this.storage.setItem('twitter_user',
        {
          name: user.name,
          userName: user.screen_name,
          picture: user.profile_image_url_https
        }).then(function() {      
          console.log("twitter");
        })
      }, function(error){
  
    });
  })
  
  }
  </code></pre>
  
  <p>and this my config file </p>
  
  <pre><code>&lt;plugin name="twitter-connect-plugin" spec="https://github.com/chroa/twitter-connect-plugin"&gt;
      &lt;variable name="FABRIC_KEY" value="ddb30e3efa7732b38e327c75a3ce57fd4c688ee1" /&gt;
      &lt;variable name="TWITTER_KEY" value="twitter key" /&gt;
      &lt;variable name="TWITTER_SECRET" value="twitter secret" /&gt;
  &lt;/plugin&gt;
  </code></pre>
  
  <p>any solutions?</p>