Read a password from the command line.

        - if confirm = True, with confirmation
        - if clear = True, plain (clear password)

def __get_password(self, description='',
                       confirm=False, clear=False, username='glances'):
        """Read a password from the command line.

        - if confirm = True, with confirmation
        - if clear = True, plain (clear password)
        """
        from glances.password import GlancesPassword
        password = GlancesPassword(username=username)
        return password.get_password(description, confirm, clear)