According to the MongoDB/Mongoose docs, the usage of callback functions has been deprecated in Mongoose 7. x. Therefore, the sample code needs to be updated to comply with the changes especially in lesson_13, lesson_14, and possibly lesson_15, if callback functions is still used in the API calls.
According to the MongoDB/Mongoose docs, the usage of callback functions has been deprecated in Mongoose 7. x. Therefore, the sample code needs to be updated to comply with the changes especially in lesson_13, lesson_14, and possibly lesson_15, if callback functions is still used in the API calls.