// Load the container registry
var registries = await arm.GetContainerRegistriesAsync();
// Select the first registry
var registry = registries.First();
// Create a new container app configuration
var appConfig = new ContainerAppConfiguration()
{
    Ingress =
    {
        AllowInsecure = false,
        TargetPort = service.dockerProfile.InternalPort,
        ExposedPort = service.dockerProfile.ExternalPort,
        Transport = Azure.ResourceManager.AppContainers.Models.ContainerAppIngressTransportMethod.Http,
        External = service.dockerProfile.ExternalPort is not null
    },
    Registries =
    {
        // How should I integrate the registry here?
    }
};
var container = await arm.CreateContainerApp(service.containerAppName, new(Azure.Core.AzureLocation.SouthCentralUS)
{
    EnvironmentId = environment.Id,
    Configuration = appConfig
});

Registries =
            {
    
                new ContainerAppRegistryCredentials()
                {
                    Identity = "",//Resource ID for user assigned managed identity
                    Server = registry.Data.LoginServer
                }
            }