I have to convert long urls to short urls on server side using bit.ly APIs. I was thinking of using some existing PHP libraries to do so like : https://github.com/tijsverkoyen/Bitly/blob/master/bitly.php
This API requires login and api key to shorten urls. But after reading the bit.ly API docs, they suggest to use oauth access token to make calls instead of API key/login. Whats the right way to do this?