I installed component then the plugin, I activated the plugin and then I could see the button on the editor but I would keep getting a page not found error. I really needed something like this :-{

This is a great and simple component, I had a list of user already and was worried about all of the input I would have to do. But this extension is great and very easy to use. Beside I love the idea of not sending the email to the added user since we are at the testing stage of the website.