Attachment files while creating cards

[navdiir]

Hi, thanks for this repo is awesome. I have a problem when I try to create a card and attach a image, in my frontend I convert an image to Base64 and send with the other information to the backend and there I set this to fileSource parameter. The problem is that I get as response an error saying that its not a file. I saw the documentation from Trello and they add files in base64 encoding to this parameter

how I could handle this in this repo, could you help me?