Create registeredUser

POST https://graph.microsoft.com/beta/devices/{id}/registeredUsers/$ref
Content-type: application/json

{
  "@odata.id": "https://graph.microsoft.com/beta/directoryObjects/{id}"
}

// Code snippets are only available for the latest version. Current version is 5.x

// Dependencies
using Microsoft.Graph.Beta.Models;

var requestBody = new ReferenceCreate
{
	OdataId = "https://graph.microsoft.com/beta/directoryObjects/{id}",
};

// To initialize your graphClient, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=csharp
await graphClient.Devices["{device-id}"].RegisteredUsers.Ref.PostAsync(requestBody);

// Code snippets are only available for the latest major version. Current major version is $v0.*

// Dependencies
import (
	  "context"
	  msgraphsdk "github.com/microsoftgraph/msgraph-beta-sdk-go"
	  graphmodels "github.com/microsoftgraph/msgraph-beta-sdk-go/models"
	  //other-imports
)

requestBody := graphmodels.NewReferenceCreate()
odataId := "https://graph.microsoft.com/beta/directoryObjects/{id}"
requestBody.SetOdataId(&odataId) 

// To initialize your graphClient, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=go
graphClient.Devices().ByDeviceId("device-id").RegisteredUsers().Ref().Post(context.Background(), requestBody, nil)

// Code snippets are only available for the latest version. Current version is 6.x

GraphServiceClient graphClient = new GraphServiceClient(requestAdapter);

com.microsoft.graph.beta.models.ReferenceCreate referenceCreate = new com.microsoft.graph.beta.models.ReferenceCreate();
referenceCreate.setOdataId("https://graph.microsoft.com/beta/directoryObjects/{id}");
graphClient.devices().byDeviceId("{device-id}").registeredUsers().ref().post(referenceCreate);

const options = {
	authProvider,
};

const client = Client.init(options);

const directoryObject = {
  '@odata.id': 'https://graph.microsoft.com/beta/directoryObjects/{id}'
};

await client.api('/devices/{id}/registeredUsers/$ref')
	.version('beta')
	.post(directoryObject);

<?php
use Microsoft\Graph\Beta\GraphServiceClient;
use Microsoft\Graph\Beta\Generated\Models\ReferenceCreate;


$graphServiceClient = new GraphServiceClient($tokenRequestContext, $scopes);

$requestBody = new ReferenceCreate();
$requestBody->setOdataId('https://graph.microsoft.com/beta/directoryObjects/{id}');

$graphServiceClient->devices()->byDeviceId('device-id')->registeredUsers()->ref()->post($requestBody)->wait();

Import-Module Microsoft.Graph.Beta.Identity.DirectoryManagement

$params = @{
	"@odata.id" = "https://graph.microsoft.com/beta/directoryObjects/{id}"
}

New-MgBetaDeviceRegisteredUserByRef -DeviceId $deviceId -BodyParameter $params

# Code snippets are only available for the latest version. Current version is 1.x
from msgraph_beta import GraphServiceClient
from msgraph_beta.generated.models.reference_create import ReferenceCreate
# To initialize your graph_client, see https://learn.microsoft.com/en-us/graph/sdks/create-client?from=snippets&tabs=python
request_body = ReferenceCreate(
	odata_id = "https://graph.microsoft.com/beta/directoryObjects/{id}",
)

await graph_client.devices.by_device_id('device-id').registered_users.ref.post(request_body)