Make ER diagram from existing schema

[AsishRaju]

Documentation Needed 📃

Canvasboard backend had a well-defined ER diagram, but with constant changes, we didn't get time to update our ER diagram to the latest schema that is being used right now.

Its Reverse Engineering Time; 😎
MongoDB schema is well defined here: APIs\models\collections, it would be great to have an updated ER diagram for the same.

Prefered Tool: Draw.io

note: don't worry about the relation between other tables (collection as we call it the NoSQL world)