Customize discobot certificate logo image

Hi Guys,
is it possible to change the “logo-small” image with a custom image?

Cattura

Ther certificate uses the site logo that you set up for your site in the setup wizard. If you wish to use a different one, change it via the /wizard.

Hi Jeff, I know,
the point is that the name of my association is long and I had to organize the home page in a different way putting the Logo and the association name in a separate header on top.
(https://forum.bibliotecadelsentiero.org).

Since I didn’t want to have a redundant logo image on the top header and also on the discourse header, I used a functional Icon as the logo and logo small images.
The problem is that the same icon is used to build the certificate. If the certificate would be rendered with e.g. the digest logo or the large icon it would solve the problem.