Singer Taylor Swift (left) has now been officially credited as the co-writer of ex-boyfriend DJ Calvin Harris’ (inset) track “This is what you came for”. Swift, 26, is now listed as a songwritercomposer for the song on BMI, the performing arts organisation that collects license fees and distributes royalties to artists. The change was instituted late last week, reported Entertainment Weekly. Upon its release, the hit track, which features Rihanna, listed Harris, 32, and one Nils Sjoberg as the songwriter-composers. The BMI record confirmed Swift co-wrote the single under the Sjoberg pseudonym.