Rails devise and twitter

Hi all

I'm following this guide:

when I try to connect by twitter (localhost:3000 or 127.0.0.1:3000) I obtain this message:

OAuth::Unauthorized

401 Unauthorized

In this link http://coreywoodcox.com/omniauth-and-twitter I read that I have to check Application type client in twitter but I cannot find the twitter page?

could you help me please? ora could you suggest me a basic tutorial?

I'm not sure what you're trying to do, but if you want to create a twitter app, suggest starting at Documentation Home | Docs | Twitter Developer Platform