title: How to share on Tumblr with sharekit
body: <p><br>
  I'm using ShareKit <a href="https://github.com/ShareKit" rel="nofollow">https://github.com/ShareKit</a> to share image on tumblr.
  But problem is when I register app on tumblr at <a href="http://www.tumblr.com/oauth/apps" rel="nofollow">http://www.tumblr.com/oauth/apps</a>, I get a API key. But there is no place to put this key on ShareKit configurator file. <p>
  Then I ignore that key, run the app and choose share on tumblr, this "login error" appear
  "The service encountered an error. Please try again later".<br>
  Any body has the same problem? how can share on tumblr using sharekit?</p>