Authentication Provider

.cs

services.AddAuthentication(options =>
  {
     options.DefaultScheme = "YOURSCHEMANAME";
     options.DefaultAuthenticateScheme = "YOURSCHEMANAME";
   })
   .AddJwtBearer("Websockets", ctx => { })
   .AddIdentityServerAuthentication("YOURSCHEMANAME", options =>
    {
       options.ForwardDefaultSelector = context =>
         {
           if (!context.Items.ContainsKey(AuthenticationSocketInterceptor.HTTP_CONTEXT_WEBSOCKET_AUTH_KEY) && 
                context.Request.Headers.TryGetValue("Upgrade", out var value) &&
                value.Count > 0 &&
                value[0] is string stringValue && 
                stringValue == "websocket")
                {
                    return "Websockets";
                }
            return "YOURSCHEMANAME";
          };
          options.TokenRetriever = new Func<HttpRequest, string>(req =>
          {
            if (req.HttpContext.Items.TryGetValue(
                   AuthenticationSocketInterceptor.HTTP_CONTEXT_WEBSOCKET_AUTH_KEY,
                   out object token) &&
                  token is string stringToken)
            {
               return stringToken;
            }
            var fromHeader = TokenRetrieval.FromAuthorizationHeader();
            var fromQuery = TokenRetrieval.FromQueryString();  // Query string auth
            return fromHeader(req) ?? fromQuery(req);
           });
           options.JwtBearerEvents = new JwtBearerEvents()
             {
               OnTokenValidated = context =>
                 {
                   // Token validation
                });