Secure authorization and all user data are managed by Spotify, as we use the official Spotify Developer Web API. Upon authorization, Discover Together will access your Spotify user ID, playlist library, and favorite songs only after you choose to give access. Your ID and favorite songs are stored in an encrypted Google Cloud database. We will absolutely never release your information to any third parties. Feel free to reach out to firstname.lastname@example.org if you have any questions or concerns.