I have executed:
$ heroku login
But when I try to push, I\'m still asked for authentication:
$ git push heroku master
Usern
I had the same problem (git couldn't authenticate). It happend that GIT wants to read auth data from %HOME%/_netrc file and on Windows you don't have this variable (only %USERPROFILE% and %HOMEDRIVE% + %HOMEPATH%)
i set HOME to %USERPROFILE% (the place where heroku saved _netrc file) and GIT started working