Add request parameter for course and user id type returned in response to GET Course Memberships

Idea created by Alberto Ruiz on May 3, 2018
    Under review

    We usually need the external id or the username in order to integrate with external systems. The endpoint GET /learn/api/public/v1/courses/{courseId}/users return the users just with the internal database id and we need to perform an extra request to get the user or course external id.

    Product Version (if applicable):0