How do add login/logout link at the top navigation?

In woocommerce, there is a “my account” section whereby you can login/register from there.

But I need the login link to be at the header, below address for example. I was trying to use Nice Login Widget. But instead of adding it below the address widget, it appended the address widget horizontally.

So, my question is:

1. Is it possible to display a login/logout link at the header, just below the address?
2. If I were to use Nice Login Widget, how do I add the widget vertically in the header instead of horizontally?

Thank you.