Cannot send dependency to Configure that depends on IHubContext

An error is thrown when passing a custom service to the Configure method of the Startup class when using AddAzureSignalR service. This is in ASP.NET Core 2.1. My code:

public interface IDatabaseChangeNotificationService
    {
        void Config();
    }

public class SqlDependencyService : IDatabaseChangeNotificationService
{
public SqlDependencyService( IHubContext<ChatHub> chatHub)
        {
        }

        public void Config()
        {
        }
}

// in the ConfigureServices method:

services.AddScoped<IDatabaseChangeNotificationService, SqlDependencyService>();

            services.AddSignalR().AddAzureSignalR("My Secret key");

// Configure method:

public void Configure(IApplicationBuilder app,
            IHostingEnvironment env,
            IDatabaseChangeNotificationService notificationService)
 {
if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                app.UseHsts();
            }

            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseCookiePolicy();

            app.UseAzureSignalR(x =>
            {
                x.MapHub<ChatHub>("/chatHub");
            });

            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });

            notificationService.Config();
}

Where ChatHub is a class the inherits from Hub (no constructor on this class). If I run the app, I get the following error:

System.InvalidOperationException: ‘AddAzureSignalR(…)’ was called without a matching call to ‘IApplicationBuilder.UseAzureSignalR(…)’. at Microsoft.Azure.SignalR.ServiceLifetimeManager1..ctor(IServiceConnectionManager1 serviceConnectionManager, IClientConnectionManager clientConnectionManager, IHubProtocolResolver protocolResolver, ILogger1 logger, AzureSignalRMarkerService marker) --- End of stack trace from previous location where exception was thrown --- at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProviderEngineScope scope) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor2.VisitCallSite(IServiceCallSite callSite, TArgument argument) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitSingleton(SingletonCallSite singletonCallSite, ServiceProviderEngineScope scope) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor2.VisitCallSite(IServiceCallSite callSite, TArgument argument) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProviderEngineScope scope) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor2.VisitCallSite(IServiceCallSite callSite, TArgument argument) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitSingleton(SingletonCallSite singletonCallSite, ServiceProviderEngineScope scope) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor2.VisitCallSite(IServiceCallSite callSite, TArgument argument) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProviderEngineScope scope) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor2.VisitCallSite(IServiceCallSite callSite, TArgument argument) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope) at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(IServiceCallSite callSite, TArgument argument) at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope) at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope) at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType) at Microsoft.AspNetCore.Hosting.Internal.ConfigureBuilder.Invoke(Object instance, IApplicationBuilder builder)

The issue goes away if I remove the IHubContext dependency from the SqlDependencyService class, or if I remove the use of the functions AddAzureSignalR and UseAzureSignalR.

[xscript]

Ah, I see. notificationService is a parameter of Configure method. This exception is intentionally put here. Before calling UseAzureSignalR, the use of HubLifetimeManager<> is forbidden. Because connections between your app server and Azure SignalR Service are not set up yet.

As a workaround, you can instantiate notificationService by app.ApplicationServices.GetRequiredService<IDatabaseChangeNotificationService>() after calling UseAzureSignalR.

[Olusheenor]

I have similar issue but on AspNetcore UseSignalR