How to use the keyper.__init__.Keychain.list_keychains function in keyper

try:
            subprocess.run(
                command,
                universal_newlines=True,
                shell=True,
                check=True,
                stdout=subprocess.PIPE,
                stderr=subprocess.PIPE
            ).stdout
        except subprocess.CalledProcessError as ex:
            log.error("Failed to get keychains: %s", ex)
            raise

        # Validate that the new keychain is there

        new_keychains = Keychain.list_keychains(domain="user")

        for path in previous_keychains:
            if path not in new_keychains:
                raise Exception("Previous keychain missing when checking keychains: " + path)

        new_path_exists = False

        # /var and /private/var are the same, but we don't know which macOS is
        # going to send back, so we have to normalize out the symlinks to do
        # the comparisons
        for new_path in new_keychains:
            if os.path.realpath(new_path) == os.path.realpath(self.path):
                new_path_exists = True
                break

        if not new_path_exists: