code: def get_course_run_id(user, enterprise_customer, course_key):
          
          try:
              course = CourseCatalogApiServiceClient(enterprise_customer.site).get_course_details(course_key)
          except ImproperlyConfigured:
              raise Http404
  
          users_all_enrolled_courses = EnrollmentApiClient().get_enrolled_courses(user.username)
          users_active_course_runs = get_active_course_runs(
              course,
              users_all_enrolled_courses
          ) if users_all_enrolled_courses else []
          course_run = get_current_course_run(course, users_active_course_runs)
          if course_run:
              course_run_id = course_run['key']
              return course_run_id
          else:
              raise Http404
docs: User is requesting a course, we need to translate that into the current course run.
  
          :param user:
          :param enterprise_customer:
          :param course_key:
          :return: course_run_id