Since Spotify doesn’t distribute physical CDs, having DiscIDs doesn’t make sense, IMHO, so not sure what you’d use cuesheets or CD stub reporting for.
If you want to import Spotify data into MusicBrainz, you will probably want to look into release editor seeding. (Note that this should be done by a human. Machine-assisted data entry is fine, but we generally frown upon fully automated data imports.)