From V3 to V4. Migration Guide

[couds]

V4 bring a lot of improvements but also a lot of Breaking changes.

Currently I didn't had the time to setup a step by step migration guide. This discussion its mean to create this guide with the help of the community,

I would like ask for Help to anyone that try to migrate from V3 to V4 to share in this thread how it when and the steps done

Thanks you very much and Happy Coding.