I'm trying to get when the module item was completed by a certain student.
I know that there is 'completed_at' for Module object, but is there any API function that returns completed_at for a ModuleItem object?
Kevin, greetings and welcome to the Community! Due to the technical nature of this question I'm going to share it with the Canvas Developers group in the Community. They are the ones who do this type of stuff with the API and should hopefully be able to help. In addition, you might consider joining this group so you'll have access to their resources and information.
Hope this helps!
Retrieving data ...