Submisson Comments API
This page documents the Submissons API of Canvas, see https://canvas.instructure.com/doc/api/submission_comments for details.
Canvas.upload_file — MethodCanvas.upload_file(c::Course, a::Assignment, u::User, file; kwargs...) -> FileUpload a file to attach to a submission comment. Return a File.
Canvas API documentation: Upload a file (POST /api/v1/courses/:course_id/assignments/:assignment_id/submissions/:user_id/comments/files)