Hi Linda,
Our twitter widgets are just using the javscript widgets provided by Twitter for profile tweets or twitter search. As such it is just javascript and no credentials have ever been passed with it. If credentials were used in javascript it would not be secure because someone could view trhe source of the page and get the credentials. To do something like that would require making server side web requests to get the tweets using the credentials but our widgets don't do that, they load the tweets client side from the user web browser using javascript.
So we don't currently have a way to show private or protected tweets. There is no way it could have worked in the past unless the tweets were not protected.
Best,
Joe