I have seen this question raised by other users but I would like to re-post so it is fresh in the database as a 2019 NEW IDEA. I'm sure this will not be an easy add on but it will make Spotify that much better of a product/tool for music discovery.
It would be nice if we can search songs via their credits Performed_by: Written_by: Produced_by:
Also, the record label should be relisted here. I see that the source is "aftermath" which is a nice touch but "source" just seems listed as a "get mad at this person" if the information is incorrect.