Go to the widget management area in your dashboard and put a meta widget in a sidebar. Otherwise, here is what you need to research to hard code it into your theme.
<?php wp_register() ?>
<?php wp_loginout() ?>
<?php wp_meta() ?>
ther are a couple of different widgets out there that can do this for you but not one for the both I think. I use password protect enhancement plugin and it works great for a login. For registering there is a good plugin called wp opt in. That way you get their email and can set them up with a password and email it to them and create a list at the same time.
Hope that helps. I’m kind of new to this but went through the same thing a while back
