OAuth2_example.rb

require 'oauth2'

client_id     = "2991b1d948ba1aed69144fb3a34474216d6a374cb876f02d51a2f40d3b783bd3"
secret_client = "d528cf49d607b476ea27b9c662615b50b29605cb5151626bc378948606e60149"
redirect_uri  = "http://localhost:3000"
site          = "http://lutron.herokuapp.com/"

client = OAuth2::Client.new(client_id, client_secret, :site => site)

client.auth_code.authorize_url(:redirect_uri => redirect_uri)
# => http://localhost:3000/oauth/authorize?response_type=code&client_id=...&redirect_uri=...

#Go to this url in your browser. You'll see the authorization endpoint. If you click on Authorize, you'll see a page with #the authorization code in it:

code = "..." # code you got in the redirect uri
token = client.auth_code.get_token(code, :redirect_uri => redirect_uri)