Yes, you certainly can!
Sign in to Anti-Joy
Go to your release
Click the pen icon to edit the release (see below)
Scroll to the "Songwriters" section
It usually takes about a week for updates to be visible in stores.
When creating your release, you have the option to include the "Songwriters" section. However, keep in mind that the first three fields in this section are reserved for the composer, lyricist, and producer, as they are mandatory (unless it's an instrumental, in which case the lyricist field is not required).