IoT Hub Connection string retrieval with Managed Identities

IoTHub.cs

static async Task GetIoTHubResource()
{
    var azureServiceTokenProvider = new Microsoft.Azure.Services.AppAuthentication.AzureServiceTokenProvider();
    var accessToken = await azureServiceTokenProvider.GetAccessTokenAsync("https://management.azure.com/");
    var tokenCredentials = new Microsoft.Rest.TokenCredentials(accessToken);
    
    var iotHubClient = new Microsoft.Azure.Management.IotHub.IotHubClient(tokenCredentials);
    iotHubClient.SubscriptionId = subscriptionId;
    
    var iotHubDescription = await iotHubClient.IotHubResource.GetAsync(resourceGroupName,iotHubName);

    //You can replace iothubowner with the name of your Shared access policy
    var keys = await iotHubClient.IotHubResource.GetKeysForKeyNameAsync(resourceGroupName,iotHubName,"iothubowner");
    
    Console.WriteLine($"Primary key for {iotHubDescription.Name} located in {iotHubDescription.Location}: {keys.PrimaryKey}");
}

iothub.csproj

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp3.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.Azure.Management.IotHub" Version="2.1.1" />
    <PackageReference Include="Microsoft.Azure.Services.AppAuthentication" Version="1.4.0" />
    <PackageReference Include="Microsoft.Rest.ClientRuntime" Version="3.0.3" />
  </ItemGroup>

</Project>