cms_thermo_active/Thermo.Active/Provider/SignalROAuthBearerProvider.cs

using Microsoft.Owin.Security.OAuth;
using System.Threading.Tasks;

namespace Thermo.Active.Provider
{
    public class SignalROAuthBearerProvider : OAuthBearerAuthenticationProvider
    {
        public override Task RequestToken(OAuthRequestTokenContext context)
        {
            var token = context.Request.Query.Get("Authorization");

            if (!string.IsNullOrWhiteSpace(token))
            {
                if (context != null)
                {
                    context.Token = token;
                    base.RequestToken(context);
                }
            }
            return Task.FromResult<object>(null);
        }
    }
}