Send SaaS creation page to partner after Payment

[Danizan1976]

Hi,
I'm using v11 CE.
I'm experiencing problem when no email (email_template_create_saas) is sent to user after payment is done in web shop.
After looking at branch 11 odoo-saas-tools/saas_portal_sale/models, i noticed this file is missing when comparing to earlier version :
account_invoice.py

I believe this file has class to send the email after payment.

I haven't tested creating this file manually in my installation but I just want to know if others have succesfully send 'Send SaaS creation page to partner' after payment.

Help pls..