What finally fixed this for me was to use GitHub desktop, go to repository settings, and remove user:pass@ from the repository url. Then, I attempted a push from the command line and was prompted for login credentials. After I put those in everything went back to normal. Both Visual Studio and command line are working, and of course, GitHub desktop.
GitHub Desktop->Repository->Repository Settings->Remote tab
Change Primary Remote Repository (origin) from:
https://pork@[email protected]/MyProject/MyProject.git
To:
https://github.com/MyProject/MyProject.git
Click "Save"
Credentials will be cleared.