Add email registration module support to Password Policy.

Not sure I follow. Please add explicit steps to reproduce.

Create a Drupal instance with this module enabled and username validation enable.
Go through the registration process.
Here is where the password validation happens but the passed in account entity has not yet set the username field.
It may be that the enabled Email registration module is having affect.

Thanks for providing more details. I will try to reproduce the issue.

I tested this and was able to create a new account with the user name check and it showed the error when I tried using the username. Thus, maybe you are correct and it's the email registration module that's causing an issue. I'll try with that.

I tested with the email registration module and see that it doesn't work with that so I've changed this to a feature request.

I see there is a patch and I just tried that but it doesn't work.

I tried some other logic based on the email_registration module to get the email address and figure out the username from that but the email address isn't in $user->getEmail() or $user->getInitialEmail() so not sure what to do here.