Nodejs has native error object Error which is very generic and does not
offer a way to differentiate different types of errors using object
types(prototype hierarchy). As the result many nodejs developer rely on
error message as the way to differentiate between different types of errors, something
which is verbose and does not scale well.
This module extends Nodejs native error to create various custom error
types based on common domain errors such as ValidationError, ResourceLockedError,
ForbiddenError, ConflictError, NotFoundError etc.
Note
Some errors can only be generated if you're using mongoose and mongodb.