define a database model User

interface User {
    id: string,
    name: string,
    xxxx: string,
}

define a DTO UserDTO

interface UserDTO {
    id: string,
    name: string,
}

defines a method to get a user.
generally, if we do not want to expose all the information, we will fix the exposed attribute (id, name).

async function getUser(){
    const user = await UserService.findOne();
    return {
        id: user.id,
        name: user.name,
    };
}
// res= { id, name }

but the above writing is not suitable for automated scenarios, and I want to use the decorator to achieve the following functions.

@ReturnDto(UserDTO)
async function getUser({
    const user = await UserService.findOne();
    return user;
}
// res= { id, name }

I have tried a lot of methods, but there is still no way to modify it while getting the return value of the function asynchronously.
can you tell me how to implement it easily?