- refresh_token + access_token expiry is sent via encrypted cookie to the browser.
- If cookie is missing or invalid, user is logged out.
- If last access token expired, use refresh token to fetch a new one and send a new cookie.
- If token refresh fails, user is logged out.
- Cookie encryption is with per-user random key stored in user meta.
- Encryption and key generation done using https://github.com/defuse/php-encryption
- Updated autoloader function to support loading namespaced classes.
Raif Atef