Login form not shown

[gelavat]

Hello.

I have installed pico-users following the readme.md file but I don't have any login form displayed.
Where should I see this login form? Also do I need to create a login.md file for this, and then once logged in I can browse all other pages if I have the right to access them?
What would need to be in this login.md page as code to show the login?

Also I tried to modify my template file themes/picocms-gallery/index.twig and adding this somewhere:
{{ login_form }}

But this would mean that all pages would display the login form, isn't it? and also this does still not show the login form.

Also do I need to put this in the config.yml file:
PicoUsers: true

I hope you can help.