Changes to Create a content

added the new optional request property metadata

added the enum value metadata to the property items/ of the query request parameter fields

added the optional property metadata to the response with the 200 status

removed the enum value instructor_ids from the property items/ of the query request parameter fields

removed the request property instructor_ids

removed the optional property instructor_ids from the response with the 200 status

added the new optional request property instructors

added the enum value instructors to the property items/ of the query request parameter fields

added the optional property instructors to the response with the 200 status

added the new optional request property difficulty

added the new optional request property published_at

added the new optional request property subjects

added the new optional request property tags

added the enum value difficulty to the property items/ of the query request parameter fields

added the enum value published_at to the property items/ of the query request parameter fields

added the enum value subjects to the property items/ of the query request parameter fields

added the enum value tags to the property items/ of the query request parameter fields

added the optional property difficulty to the response with the 200 status

added the optional property published_at to the response with the 200 status

added the optional property subjects to the response with the 200 status

added the optional property tags to the response with the 200 status