How do I use Clean Login?

The info on usage is here
https://wordpress.org/plugins/clean-login/installation/

Basically we just need to put in the plugin’s shortcode in the post/page content that we want the form to appear.

If you have further question on how to use this plugin please consider posting the question directly inside plugin’s own sub forum via this link
https://wordpress.org/support/plugin/clean-login#postform