Joining game using API

[Demo]

Is’nt this a dupe of

Help getting roomId

So I need to get the roomId to add better functionality and interactivity in my Gimkit map. I already tried making API requests to https://www.gimit.com/api/matchmaker/find-info-from-code with code, but it never returns the proper roomId, i always get something wrong and much shorter. TL;DR: I know checking the requests gimkit makes to the network that they use that URL to find roomId but it never works for me, any other options, or am I just doing it wrong?