ruby实现github第三方认证

#coding: utf-8
require 'sinatra'
require 'omniauth'
require 'omniauth-github'
 
use Rack::Session::Cookie
use OmniAuth::Builder do
 provider :github, 'b478ae6b31dd730b20d1','89f67d361fb348c959eaafea7e40f6db8b166366'
end
 
get '/' do
 <<-HTML
 <a href='/auth/github'>Sign in with github</a>
 HTML
end
  
post '/auth/:name/callback' do
 auth = require.env['omniauth.auth']
end