I did not have any git credentials registered with Windows Credentials and I still received this error, even after selecting my windows user account in the VS User Dialog popup.

After a day of trying different things like re-installing GIT for windows, I managed to fix this issue by deleting a this file: "C:\Users(profile)\AppData\Local\GitCredentialManager\tenant.cache".

On the next retry, a GIT entry showed up in my Windows Credentials generic list