How to use the fbs.builtin_commands._util.update_json function in fbs

def _login(username, password):
    update_json(path(SECRET_JSON), {'fbs_user': username, 'fbs_pass': password})
    _LOG.info('Saved your username and password to %s.', SECRET_JSON)

_LOG.setLevel(logging.WARNING)
    try:
        clean()
        freeze()
        if is_windows() and _has_windows_codesigning_certificate():
            sign()
        installer()
        if (is_windows() and _has_windows_codesigning_certificate()) or \
            is_arch_linux() or is_fedora():
            sign_installer()
        repo()
    finally:
        _LOG.setLevel(log_level)
    upload()
    base_json = 'src/build/settings/base.json'
    update_json(path(base_json), { 'version': release_version })
    _LOG.info('Also, %s was updated with the new version.', base_json)

"revocation certificate stored as '/root/.gnupg/openpgp-revocs.d/",
        ".rev'",
        include_bounds=False
    )
    pubkey = _snip(result.stdout,
                   '-----BEGIN PGP PUBLIC KEY BLOCK-----\n',
                   '-----END PGP PUBLIC KEY BLOCK-----\n')
    privkey = _snip(result.stdout,
                    '-----BEGIN PGP PRIVATE KEY BLOCK-----\n',
                    '-----END PGP PRIVATE KEY BLOCK-----\n')
    makedirs(path(_DEST_DIR), exist_ok=True)
    pubkey_dest = _DEST_DIR + '/' + _PUBKEY_NAME
    Path(path(pubkey_dest)).write_text(pubkey)
    Path(path(_DEST_DIR + '/' + _PRIVKEY_NAME)).write_text(privkey)
    update_json(path(BASE_JSON), {'gpg_key': key, 'gpg_name': name})
    update_json(path(SECRET_JSON), {'gpg_pass': passphrase})
    _LOG.info(
        'Done. Created %s and ...%s. Also updated %s and ...secret.json with '
        'the values you provided.', pubkey_dest, _PRIVKEY_NAME, BASE_JSON
    )