This IIQDA plugin was made with some very old APIs for IDN. Before we’re supported our current OAuth 2.0 standard. I wouldn’t use this. The author who wrote this was focused on IIQ and hasn’t kept up with IDN.
If you want to manage transforms, just use the v3 transforms APIs. Or if you are migrating from tenant to tenant use the v3 sp-config APIs.
Hope this helps!