"Operation `users.insertOne()` buffering code example

Example: mongodb Operation `events.find()` buffering timed out

The issue on model.find() error: Operation products.find() buffering 
timed out after 10000ms" was resolved by removing the node_module 
folder, *.json files and reinstalling the mongoose module.

The issue on the warnings was resolved by following this
instructions https://mongoosejs.com/docs/deprecations.html