Following some tutorials, on Windows 7, I installed the Heroku CLI (first Git, then Heroku-x64). Git has several options to select during installation, I kept it default for most of them, except the editor and the interface: my choice is mintty. In mintty I changed my Git username and email.
After installing Heroku-x64, mintty still does not support the heroku command. And there's nothing to run in Heroku-x64's folder, so I use system's cmd.exe instead, and it supports the heroku command.
Now, following tutorials, I run heroku container:login, several seconds later it says
! not logged in
Shouldn't it ask me to input my Heroku username and password?