Non-owner users can't issue access tokens on repositories

I am interested in a setup where users can issue access tokens for HTTPS authentication even if they do not own a specific repository (they have read access, for example).

Here is a clear use case. User A owns a private repository R, A adds user B to subscribers (for access to Merge requests, for example), and sets a permission rule in R for B to write to a specific branch. Once this is done, user B cannot set its own access token to take advantage of authentication with access tokens. Navigating +access-tokens as user B in the UI returns:

Not allowed here
Sorry, you don't have permission to access this page or the information in this page is not shared with you.
You are logged in as B.