Membership plugin - how to add user and pasword

I have installed Membership plugin on my website, but I don't see how my members will login on the website when they want to see the protected content. I was expecting that on the website will appear a menu that contains 2 boxes: user and password, so they can acces their account. But nothing like this appears on the site. Do I have to install another plugin related to the Membership so that my members can login to the site? If not, how should I proceed.