After transforming the Guest account to a Customer through the back office, the customer's merchant can't access his account since the password is randomly generated and never transferred to him.
After transforming the Guest account to a Customer through the back office, the customer's merchant should be able to access his account.
Steps to reproduce the behavior:

So the customer can't access his account, except by resetting his password.
Why?
The old template used to send in the password but for security reasons, we have hidden it on the new template design.
Add a link to reset the password (the same from password_query template) with a new wording.

@MatShir
It's not a regression there was the same issue with old email templates and old PS version

Hi @MatShir,
Here's the PR: https://github.com/PrestaShop/PrestaShop/pull/5889 to hide the password variable from emails.
Thanks!
Fixed by #18234
Most helpful comment
Related to https://github.com/PrestaShop/PrestaShop/issues/14414 & https://github.com/PrestaShop/PrestaShop/issues/9650