We generally frown on fully-automated adding of data to the database. See e.g.,
I’ve found Spotify’s release dates to be pretty hit and miss. For most current/modern releases (where digital and physical editions are released simultaneously (if they have a physical manifestation!)), it will likely be correct, but Spotify stores the oldest release date, and it’s unlikely that a digital media online streaming album was released in, say, 1978… (This is also the reason my importer—that this topic is about—doesn’t include release date information.)