You can credit artists on your track in the "Track Details" section when preparing your track for release.
You can take a look at Spotify's documentation here: https://providersupport.spotify.com/article/what-artist-roles-are-considered-for-the-credits-section
Currently, Spotify publicly displays the following roles: Main Artist, Featured Artist, Remixer, Composer, Lyricist, Producer, Arranger, Conductor, Orchestra, Actor.