If restoring the terminal state fails, "echo" no longer works, which means
that anything the user types is no longer shown. The login itself may already
have succeeded, so we should not fail the command, but it's good to inform
the user that this happened, which may give them a clue why things no longer
work as they expect them to work.
With this patch:
docker login -u yourname
Password:
Error: failed to restore terminal state to echo input: something bad happened
Login Succeeded
We should consider printing instructions how to restore this manually (other
than restarting the shell). e.g., 'run stty echo' when in a Linux or macOS shell,
but PowerShell and CMD.exe may need different instructions.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>