The getpass module provides two functions: Prompt the user for a
password without echoing. The user is prompted using the string
prompt, which defaults to 'Password: '. On Unix, the prompt is
written to the file-like object stream. stream defaults to the
controlling terminal (/dev/tty) or if that is unavailable to
sys.stderr (this argument is ignored on Windows). If echo free
input is unavailable getpass() falls back to printing a warning
message to stream and reading from sys.stdin and issuing a
GetPassWarning. Availability: Macintosh, Unix, Windows. If you
call getpass from within IDLE, the input may be done in the
terminal you launched IDLE from rather than the idle window
itself. Return the “login name” of the user. Availability: Unix,
Windows. This function checks the environment variables LOGNAME,
USER, LNAME and USERNAME, in order, and returns the value of the
first one which is set to a non-empty string. If none are set,
the login name from the password database is returned on systems
which support th