Read and manage a Deezer user's library and playlists (My Music) via the authenticated Deezer API

Steps

1. Complete Deezer's OAuth flow with at least `basic_access` and `manage_library` permissions granted
2. Call the authenticated user endpoint (`/user/me/...`) with the access token to list the user's playlists, which include both playlists they created and ones they've bookmarked into 'My Music'
3. Fetch a specific playlist's tracks via its playlist resource, and use the corresponding endpoints to add or remove tracks when the user owns or has bookmarked the playlist
4. Create a new playlist under the authenticated user's account via the appropriate write endpoint, then add tracks to it in a follow-up call
5. To manage the user's saved tracks/albums/artists ('My Music' library, not just playlists), use the corresponding user library endpoints for adding/removing those resources
6. Respect Deezer's attribution and branding requirements when displaying fetched user library data in your app, per their developer guidelines