how to credit the authors?

[midwiflect]

hi all

maybe a silly question, but please bear with me, I don't have background in computer science. I am a researcher, and I did collect data using this emoji picker. Now it is the time to write the paper, and I want to credit the authors/version properly.

Can anyone point me in the direction of who will be the most relevant name to cite as author? I used the v1.2.0. and in the copyright section of the licence, there are 3 different names
Copyright (c) 2015-2022 OneSignal
Copyright © 2012 DIY Co
Copyright (c) 2015 Cal Henderson

Any help will be greatly appreciated.