Registration form CF7

Hello, i’m tring to create a registration form because i need to add 4 checkboxes to basic form (terms & cond., direct marketing etc.).
i’m using “frontend registration – contact form 7” but free version don’t include password field. How can i do this with code? I saw this link (https://www.mootpoint.org/blog/wordpress-contact-form-7-user-registration/) but doesn’t work.

Can you help me please?

Yari