A screenshot that you have tested with "Try this API".

Not possible, as the "Try this method" GUI does not have the setting needed.

What would you like to see in the library?

An encryption key is supported for upload but not download, I'm not sure why since this seems like it should be implemented on both. Specifically, downloadManyFiles.

Describe alternatives you've considered

Using the HTTP methods directly or adding extra headers, however, I'm not sure how to override the default fetch client. No options to add extra seems supported?

Additional context/notes

No response