Missing user_metadata in userInfo of auth0 - authentication

Question

For authentication I am using Auth0 AuthenticationApi. In Account Controller, I need to fetch the user_metadata but it's missing. Any alternative to fetch the user_metadata?
AuthenticationApiClient client = new AuthenticationApiClient(new Uri($"https://{_auth0Options.Domain}/"));
var authenticateResponse = await client.GetTokenAsync(new ResourceOwnerTokenRequest
{
ClientId = _auth0Options.ClientId,
ClientSecret = _auth0Options.ClientSecret,
Scope = "openid",
Realm = _auth0Options.Connection,
Username = vm.EmailAddress,
Password = vm.Password
});
var user = await client.GetUserInfoAsync(authenticateResponse.AccessToken);
if (user.UserMetadata != null)
{
// Giving error...any alternative to access the userMetaData ?
}

Answer 1

Yes, as far as I see it now, the legacy call still works. However, I don't have a non-legacy solution yet :(
using (var client = GetClient())
{
var jObject = new JObject(new JProperty("id_token", id_token));
var response = await client.PostAsJsonAsync("tokeninfo", jObject);
if (response.IsSuccessStatusCode)
{
var userProfileJson = JObject.Parse(await response.Content.ReadAsStringAsync());
retVal.user_id = userProfileJson.Value<string>("user_id");
retVal.email = userProfileJson.Value<string>("email");
retVal.user_name = userProfileJson.Value<string>("nickname");
if (userProfileJson.Value<string>("created_at") != null)
{
retVal.created_at = userProfileJson.Value<DateTime>("created_at");
}
var exists = userProfileJson.TryGetValue("user_metadata", out JToken meta);