title: Laravel Socialize giving undefined access_token
body: <p>I followed the laracasts tutorial on Socialite with Laravel 5.0 and I ran in to the below error.  It occurred after logging in to GitHub and being redirected.  I don't know how Socialize works on the back end.</p>
  
  <pre><code>ErrorException in AbstractProvider.php line 257:
  
  Undefined index: access_token in AbstractProvider.php line 257
  at HandleExceptions-&gt;handleError('8', 'Undefined index: access_token',
  '/home/vagrant/blog/vendor/laravel/socialite/src/Two/AbstractProvider.php', 
  '257', array('body' =&gt; object(Stream))) in AbstractProvider.php line 257
  at AbstractProvider-&gt;parseAccessToken(object(Stream)) in 
  AbstractProvider.php line 232
  at AbstractProvider-&gt;getAccessToken('d21bd355569b6249cfd3') in 
  AbstractProvider.php line 195
  </code></pre>