Well a organisation is not a user, so it’s not that
As a organisation member, try your own ID, and if that doesn’t work, try the userID of the person whom originally created the Extension. (I don’t have an organisation to test against)
Also a reminder that all data stored in the config service should be treated as public, even the developer segment.
I was just messing with this for extension chat, and I used my own account, and the user_id of my billing manager. The “owner” is my personal account. The billing manger User ID worked, so I think it can be anyone in the organization.