Get a student signature link on a course

Retrieve the signature link(s) of a student(s) linked to a course. This endpoint is useful for Edusign integrations, you can add the retrieved signature links as a button or an iFrame.
WARNING This is an heavy request, a special delay is applied to it.
WARNING Be careful, using this endpoint will send a signature email and authorize all enrolled students within the course provided to sign the attendance sheet.