bloom-release fais: Aborting pull request: HTTP Error 401: Unauthorized

edit

I've been seeing this for a few years IIRC and finally feeling like resolving.

bloom-release seems to be working fine except that it fails to open a PR on rosdistro github repo.

$ bloom-release --rosdistro melodic --track melodic scan_tools --edit
:
==> Checking on GitHub for a fork to make the pull request from...
Could not find a fork of ros/rosdistro on the 130s GitHub account.
Would you like to create one now?
Continue [Y/n]? 
Aborting pull request: HTTP Error 401: Unauthorized (https://api.github.com/repos/ros/rosdistro/forks)
The release of your packages was successful, but the pull request failed.
Please manually open a pull request by editing the file here: 'https://raw.githubusercontent.com/ros/rosdistro/master/melodic/distribution.yaml'
<== No pull request opened.

No idea what's wrong, nor what to look (other than looking into bloom's code, which I don't mind doing)

$ apt-cache policy python3-bloom
python3-bloom:
  Installed: 0.10.1-100
  Candidate: 0.10.1-100
  Version table:
 *** 0.10.1-100 500
        500 http://packages.ros.org/ros/ubuntu focal/main amd64 Packages
        500 http://packages.ros.org/ros/ubuntu focal/main i386 Packages

Part of my git config:

$ more ~/.gitconfig 
[core]
        editor = emacs -nw
[credential]
        helper = cache --timeout=14400
# Enforce SSH
##[url "ssh://git@github.com/"]
##  insteadOf = https://github.com/
# Always use ssh for github, even if the remote URL uses https or git
[url "git@github.com:"]
        insteadOf = git://github.com/
[url "git@github.com:"]
        insteadOf = https://github.com/
[fetch]
        prune = true
[url "git@gitlab.com:"]
        insteadOf = https://gitlab.com/

Another example (ros-drivers/rgbd_launch#48)