Description
When I try to push to a public organizational repo, I see a 403 permission denied error:

I can push to personal repositories (on my ms609 account) from within Atom, and can push to the organizational repo using GitHub Desktop.
Reproduces how often:
Reproduces all the time on this machine – though I think I recall it working as expected on a different machine (same OS / Atom version)
Versions
Windows 10.
Atom : 1.60.0
Electron: 9.4.4
Chrome : 83.0.4103.122
Node : 12.14.1
apm 2.6.2
npm 6.14.13
node 12.14.1 x64
atom 1.60.0
python 3.9.7
git
visual studio
Additional Information