Proposal for performance: Refactor documents

[ghost]

the flow from http request goes like: JSON -> DTO -> Document -> Document -> DTO -> JSON
A suggestion would be to go JSON -> Document -> Json, Skipp the DTO.
The proposal then is to have a .validate(document) on a dto-like struct, this will make is possible to go [DTO]::validate(document).
This validate method can be generated using a Macro, this macro cleans and makes sure the fields in the document is correct.

Downside: the document struct is a mongodb struct, making is less clean than breaking it out.
Upside: Performance will increase.