How do I add ServerlessHub?

Trying to add multiple ServerlessHub in one azure function .NET 5 project.

Having "No job functions found. Try making your job classes and methods public. If you're using binding extensions (e.g. Azure Storage, ServiceBus, Timers, etc.) make sure you've called the registration method for the extension(s) in your startup code (e.g. builder.AddAzureStorage(), builder.AddServiceBus(), builder.AddTimers(), etc.).".

    public class ChatHub : ServerlessHub
    {
        [FunctionName("negotiate")]
        public SignalRConnectionInfo Negotiate([HttpTrigger(AuthorizationLevel.Anonymous)] HttpRequest req)
        {
            return Negotiate(req.Headers["x-ms-signalr-user-id"], GetClaims(req.Headers["Authorization"]));
        }

        [FunctionName(nameof(OnConnected))]
        public async Task OnConnected([SignalRTrigger]InvocationContext invocationContext, ILogger logger)
        {
            if (invocationContext.Claims.TryGetValue("id", out var groupName))
            {
                await Groups.AddToGroupAsync(invocationContext.ConnectionId, groupName);
                logger.LogInformation($"{invocationContext.ConnectionId} has connected");
            }
            else
            {
                logger.LogInformation($"{invocationContext.ConnectionId} does not have id claim");
            }
        }

        [FunctionName(nameof(OnDisconnected))]
        public async Task OnDisconnected([SignalRTrigger]InvocationContext invocationContext, ILogger logger)
        {
            if (invocationContext.Claims.TryGetValue("id", out var groupName))
            {
                await Groups.RemoveFromGroupAsync(invocationContext.ConnectionId, groupName);
                logger.LogInformation($"{invocationContext.ConnectionId} disconnected");
            }
            else
            {
                logger.LogInformation($"{invocationContext.ConnectionId} does not have id claim");
            }
        }
    }

Azure / azure-functions-signalrservice-extension

How do I add ServerlessHub? #270