I am adding one user to projects on Autodesk hubs (both BIM360 and ACC) with both these endpoints :

• https://developer.api.autodesk.com/construction/admin/v1/projects/:projectId/users
• https://developer.api.autodesk.com/hq/v1/regions/eu/accounts/:account_id/projects/:project_id/users

and I am getting the following error :
{
“code”: 1006,
“message”: “You have reached the maximum number of members for BIM 360 Docs”
}
It’s a bit unclear – does this mean that there are too many users on a project ? on a hub , or maybe the user is added to too many projects ?

Is there a documentation for these limits and error codes ?