SignalR Service Negotiation in C# ASP.NET Core

SignalRProvider.cs

public async Task<NegotiationResponse> Negotiate(Guid userId, CancellationToken ct)
{
    string connectionString = "Endpoint=https://myapp.service.signalr.net;AuthType=azure.msi;Version=1.0;"
    ServiceManager serviceManager = new ServiceManagerBuilder()
      .WithOptions(option =>
      {
          option.ServiceEndpoints =
          [
              new(connectionString)
          ];
      })
      .BuildServiceManager();

    ServiceHubContext hubContext = await _serviceManager
      .CreateHubContextAsync(_options.HubName, ct)
      .ConfigureAwait(false);

    NegotiationResponse response = await _hubContext.NegotiateAsync(
      new NegotiationOptions()
      {
          UserId = userId.ToString(),
          EnableDetailedErrors = _options.EnableDetailedErrors
      }, ct)
      .ConfigureAwait(false);

    return response;
}