=== Input validations ===
The service validates all input it receives from a client and returns a <code>422</code> (Unprocessable Entity) HTTP [[#Error_codes_and_responses|error code with a descriptive error object]].
= Notes =
* Resource for modules => which modules are available for a given role and belong to which category
* Nested URLs vs. filter via get parameter => <code>/users/<UID>/products</code> vs. <code>/products/?userId=<UID></code>, (choose a better word for product?)
* Sudo mechanism, via custom HTTP header, for example <code>X-USER</code>
=== Reseller resource ===