Google Classroom API modifyAttachments

Question

When executing the courses.courseWork.studentSubmissions.modifyAttachments method in the Google Classroom API, a 403 error is returned when I try to add the att

Answer 1

It took me a while to figure this out myself, but the best way to go in my opinion is to first create the coursework (i.e. assignment or question) itself with Google Script or using the Classroom API. The coursework is then associated with the correct console project and you are cleared to manage the submissions from thereon.