I hope you're doing well. I'm working on a Google Apps Script Gmail Add-on card services project and trying to implement a file upload functionality within the add-on. I've reviewed the documentation and examples, but I'm still facing some challenges.
My goal is to create a Gmail Add-on card services that allows users to upload a file, and also i want to send that file in api services.
Here is the link of Card Services addon : https://developers.google.com/apps-script/reference/card-service
can anyone guide me on this?