Problem
I can't find a way to publish a "private" google sheets addon and share it to testers with the new G Suite Marketplace process as it used to be possible with the Chrome Web Store publication.
Description
I used to publish google sheets addons "privately" (with no verification) via the Chrome Web Store. The process was to publish the addon selecting "Private" as Visibility and then checking "Only Trusted Testers from current publisher settings" adding those users to the list of allowed testers.
Since now new addons can be published only via G Suite Marketplace, I can't find a way to replicate the publishing method described above.
The only possibilities I see are two and none work in my case:
The first is to publish the addon publicly and select "unlisted". This method requires a verification process that I don't need since I just what to share the addon with a handful of users. The second is to publish it privately, but this is only possible if the users are within the same organization. This will also not work since I want to share it with testers outside the organization.
I've been also considering publishing the addon with the testers accounts but linking it to a script owned by myself but I assume this won't be possible.
Question
Is there a way to replicate the "Private" publishing to testers of the Chrome Web Store (or any way to selected users not necessarily belonging to the same organization) with the new G Suite Marketplace?