This is for consistency with other commands which use prompts, all of
which require "yes" rather than "y" to confirm.
We also migrate the login command to use UIInput, which now supports
securely asking for passwords or secrets via the speakeasy library.
Once you start reading from stdin, that is a blocking call that will
never finish. So when a context is canceled causing the input method to
return, the read will remain blocking in the running goroutine.
There isn't a real solution for it (e.g. its not possible to unblock the
read) so the only solution is to make the reader reusable.
Alisdair McDiarmid