How can I add http headers to vtkHttpDataSetReader ?

Web vtk.js
1

I am trying to upload a file in vtk.js .gz format from a server that needs authentication.
I need add Authorization header to vtkHttpDataSetReader.
How can I add headers to vtkHttpDataSetReader ?

const reader = vtkHttpDataSetReader.newInstance({ fetchGzip: true });
reader.setUrl("https://example.com/data.vtkjs", {loadData: true, headers:{"Authorization": "ZBXHSsxcss...."} }).then(() => {...});

This code does not work the header is not added.

2

The options are not kept for the actual requests. But the code can be updated to properly handle it.
Contribution are welcome.