Use Twitter via API

gistfile1.rb

# use twitter.gem earlier than 5.0.0

require "pp"
require "twitter"

# 1. Comment out oauth_token and oauth_token_secret.
# 2. Visit https://dev.twitter.com/apps/new. Get consumer_key and consumer_secret.
# 3. Execute.
# 4. Visit the Developper's site agein.
# 5. Go to "settings", and get oauth_token and oauth_token_secret.
# 6. Change "Application Type" to "Read, Write and Access direct messages". Wait for a momenet to reflect.
Twitter.configure do |config|
  config.consumer_key    = "CONSUMER_KEY"
  config.consumer_secret = "CONSUMER_SECRET"
end

client = Twitter::Client.new(
  oauth_token:        "OAUTH_TOKEN",
  oauth_token_secret: "OAUTH_TOKEN_SECRET"
)

#pp Twitter.update("I'm tweeting with gem 'twitter'.")
#pp client.user("gem")

pp client.direct_message_create("", "")