Which type of auth do I use to automatically send a tweet when I update my website?

oauth
authorization

#1

In the Obtaining access tokens section of the documentation, “Just want to access the API from your own account… - Tokens from dev.twitter.com” seems the best fit. Am I correct, and if not, what category of authorisation should I be using. Please note that I will not be allowing the public to send tweets from my web site, nor be sending high counts of tweets.