Changes to Create Section

the request property courses_section/blocker_lesson_id became not nullable

the request property courses_section/blocker_section_id became not nullable

the response property blocker_lesson_id became nullable for the status 201

the blocker_lesson_id response's property type changed from string to integer null for status 201

the blocker_section_id response's property type changed from string null to integer null for status 201

for the path request parameter course_id, the type was generalized from integer to string

added the optional property hint to the response with the 401 status

added the optional property hint to the response with the 404 status

added the optional property hint to the response with the 422 status