client recieves data as [object object] - signalr

Question

I am trying to send some objects back to client after connecting, but somehow they are receiving them as empty arrays {} when List<T> is sent and as [object Object] for
here is my hub code:
public class MyHub : Hub
{
private static readonly List<User> Users = new List<User>();
private const string DateTimeFormat = "HH:mm:ss tt zzz";
public async Task Join(string username, UserType usertype, string locale, CallerInfo callerInfo)
{
// Add the new user
var user = Users.FirstOrDefault(e => e.Username == username);
if (user != null)
{
Users.Remove(user);
}
Users.Add(new User
{
Username = username,
ConnectionId = Context.ConnectionId,
Type = usertype,
Locale = locale,
ConnectionStartTime = DateTime.Now.ToString(DateTimeFormat),
CallerInfo = callerInfo
});
await SendUserListUpdate(StatusConstants.Join, usertype);
}
public async Task SendUserListUpdate(string status, UserType userType, string conID = "")
{
object[] args = { Users, status, conID == string.Empty ? Context.ConnectionId : conID, userType };
await Clients.All.SendCoreAsync(MethodNameConstants.UpdateUserList, args);
}
}
and here is my client code:
"use strict";
var locale = 'ar-SA';
var username = 'test-user';
var usersList;
var connection = new signalR.HubConnectionBuilder().withUrl("/MyHub").withAutomaticReconnect().build();
// register listeners
connection.on('UpdateUserList',
function(users,status, connectionId, userType) {
usersList = users;
console.log(users);
console.log(usersList);
console.log('status : '+ status);
console.log('connection id : '+ connectionId);
});
// join client list
connection.start().then(async function () {
console.log('trying to join users list');
await connection.invoke('Join',username,'guest', locale, null);
console.log('join successful');
}).catch(function (err) { console.error(err); });
I am trying to receive correct objects on client side so that I can handle them correctly. I couldn't figure out why it is received like this