Index and Link a Pointcloud from a las file

Hi all,
I’m currently working with automated modelling from pointcloud data. As a verification I would like to automate linking in the original pointcloud in the Revit project. This requires 2 steps:
1 index the raw las data into an rcp. I found the following information but can’t get it to work: https://forums.autodesk.com/t5/revit-architecture-forum/batch-pcg-creation-using-autodesk-point-cloud-indexer/m-p/3252712/highlight/true#M55994.
EDIT this turned up in a search today: https://forums.autodesk.com/t5/revit-architecture-forum/revit-2019-insert-point-cloud/m-p/7995318/highlight/true#M194193
So, Recap API: https://forge.autodesk.com/en/docs/reality-capture/v1/developers_guide/basics/ has been put behind a paywall. That is a layer of complexity I could do without for the moment… I’ll stick with Revit 2018 then.
2 create a Pointcloud Link, By Shared Coordinates. There seems to be a lot of documentation on how to get info from a linked pointcloud, but I have not been able to find anything on how to create one in the first place. Is it even possible?