Generate and SAVE a playlist to the user's diggercamp account. It starts from a seed track and
develops the set from there (energy and genre flow), optionally ending on a chosen track. Requires
the user to be signed in to diggercamp.
- url: seed track link (Bandcamp / YouTube / SoundCloud) — the playlist starts here.
- n: number of tracks, 5 to 30 (default 15).
- end_url: optional link of the track to END on.
- vibe: optional one of warm_up, afterhours, yoga, focus, sunset (shapes the energy curve).