RegistrationRequest.User omitempty ineffective

hello. when i use RegisterWithContext func for the purpose of https://fusionauth.io/docs/v1/tech/apis/registrations#create-a-user-registration-for-an-existing-user such as

    res, errs, err := faClient.RegisterWithContext(
        ctx, userID, fusionauth.RegistrationRequest{
            GenerateAuthenticationToken: true,
            Registration: fusionauth.UserRegistration{
                ApplicationId: applicationID,
                Id:            rID,
                Username:      uname,
            },
            SkipRegistrationVerification: true,
        })

it always fails with errs.FieldErrors of map[user.email:[{Code:[blank]user.email Data:map[] Message:You must specify either the [user.email] or [user.username] property. If you are emailing the user you must specify the [user.email].}] user.password:[{Code:[blank]user.password Data:map[] Message:You must specify the [user.password] property.}] user.username:[{Code:[blank]user.username Data:map[] Message:You must specify either the [user.email] or [user.username] property. If you are emailing the user you must specify the [user.email].}] userId:[{Code:[duplicate]userId Data:map[] Message:A User with Id [2bc3b58e-762a-40f8-b4cf-6dcc99ec09c8] already exists.}]] which basically means that it simultaneously complains about user.email/user.password/user.username being empty and userId already existing (not a surprise, I didn't intend to create a new user). however, when I do:

type faReg struct {
    DisableDomainBlock           bool                        `json:"disableDomainBlock"`
    GenerateAuthenticationToken  bool                        `json:"generateAuthenticationToken"`
    Registration                 fusionauth.UserRegistration `json:"registration,omitempty"`
    SendSetPasswordEmail         bool                        `json:"sendSetPasswordEmail"`
    SkipRegistrationVerification bool                        `json:"skipRegistrationVerification"`
    SkipVerification             bool                        `json:"skipVerification"`
}

func faDoReg(faClient *fusionauth.FusionAuthClient, ctx context.Context, userId string, request faReg) (*fusionauth.RegistrationResponse, *fusionauth.Errors, error) {
    var resp fusionauth.RegistrationResponse
    var errors fusionauth.Errors

    restClient := faClient.Start(&resp, &errors)
    err := restClient.WithUri("/api/user/registration").
        WithUriSegment(userId).
        WithJSONBody(request).
        WithMethod(http.MethodPost).
        Do(ctx)
    if restClient.ErrorRef == nil {
        return &resp, nil, err
    }
    return &resp, &errors, err
}

//...
    res, errs, err := faDoReg(
        faClient, ctx, userID, faReg{
            GenerateAuthenticationToken: true,
            Registration: fusionauth.UserRegistration{
                ApplicationId: applicationID,
                Id:            rID,
                Username:      uname,
            },
            SkipRegistrationVerification: true,
        })
//...

it works without issues, because User field was not included.

please consider making fusionauth.RegistrationRequest User field a pointer type so that omitempty works, as it is ineffective for structs, and the existence of omitempty here means that it was intended to be omittable.

FusionAuth / go-client

RegistrationRequest.User omitempty ineffective #77