twitter_oauth_toy.rb

require 'YAML'
require 'twitter_oauth'

ck = 'consumer_key'
cs = 'consumer_secret'

client = TwitterOAuth::Client.new(
    :consumer_key => ck,
    :consumer_secret => cs
)

puts 'authenticating'
request_token = client.request_token(:oauth_callback => 'oob')

puts 'In a browser, go to:'
puts request_token.authorize_url

puts
print 'PIN: '
pin = $stdin.gets.chomp

access_token = client.authorize(
  request_token.token,
  request_token.secret,
  :oauth_verifier => pin
)

puts
puts client.rate_limit_status.to_yaml

puts
puts "token: #{access_token.token}\n"

puts "secret: #{access_token.secret}"