Is there a simpler way to implement private file uploads for premium Nostr-build users on my web app? 

I already suggest your site for file uploads, but a one-click private upload option would be way more convenient.

This is the project & private file upload is the most requested feature. 
https://image.nostr.build/4697f50970570e0b3f883dfa6581ff30b71569d993b5e86c095a1e4d906fc697.jpg