Lean option on Query

While returning data from the database as an API response, the virtuals/methods available on a mongoose document are unnecessary. Lean option can be set on such queries to return just the data directly from the database. It also improves the overall performance of the API.

Model Relations

Relations are logical links which define how models are connected with each other. A document of a model can be connected to one or more documents of the same or another model.

Authentication vs Authorization

• Authentication: identifying the user who is accessing the resource
• Authorization: checking if the user has permission to perform an action on the resource (e.g updating the resource)

JWT for Authentication

JWT or JSON Web Token is a preferrable method for authenticating REST APIs because: