https://www.youtube.com/watch?v=uEp2OvxjWP4&list=PLj4FqMuy9xTg6qw7r4g2aCmg4d-WfEvI-&index=2&t=0s
OpenID is service that allows you to log-on to many different websites using a single indentity. Find out more about OpenID and how to get an OpenID enabled account.