Wrong id when retrieving uploaded file from upload_image()

[laudmt]

When uploading an image with upload_image the return object cytomine.models.storage.UploadedFile object has an id attribute that I though would be the cytomine image id.

Although, it is not. This id is different from the actual id of the image, that can be retrieved by fetching the ImageInstanceCollection() of the project and getting this id.

Why? Could you add more documentation to explicitely explain what are those id? Is there a more optimised way of obtaining the real id of the image?

Thank you!