How to set mail password under the new interface?

Dear OpalStack support team:

This might be a silly question but I can't find the input to set the password anywhere when I create a mail address in my Opalstack account.

No password item found

So, I'm in need to know how to set the password. The docs don't seem to be updated with the new interface https://help.opalstack.com/article/105/webmail

Also, I tried resetting the password from the webmail login but, of course, it asks for the current password which I couldn't set.

Hope you can help me because it's kind of urgent.

Regards.