This function retrieves the submissions to a specific assignment in a specific course in the Canvas LMS API.
get_assignment_submissions(canvas, course_id, assignment_id, per_page = 100)A data frame containing the submission data.
An object containing the Canvas API key and base URL, obtained through the canvas_authenticate function.
The ID of the course for which to fetch submissions.
The ID of the assignment for which to fetch the submissions.
(Optional) The number of submissions to retrieve per page of results (default is 100).