Reload/Refresh dynamically the app with `UseBranchWithServices`

[AmbroiseCouissin]

Hi!

I have been using UseBranchWithServices for quite sometime now and it is great.
I'm using it for multitenancy with IdentityServer4. One branch per tenant.

The problem I have is that I want to create new tenants dynamically without restarting the app.

For example, if I want to add new branches with newly created tenants every 15s, I could do something like this:

            Task.Run(async () =>
            {
                while (true)
                {
                    List<string> oldTenantIds = TenantIds ?? new List<string>();
                    TenantIds = GetTenants(db);
                    var tenantIdsToSubscribe = TenantIds.Except(oldTenantIds).ToList();
                    if (tenantIdsToSubscribe.Count != 0)
                        foreach (string tenantId in tenantIdsToSubscribe)
                            app.UseBranchWithServices($"/{tenantId}",
                                services => GenericServicesConfig(services, db, tenantId),
                                appBuilder => GenericAppBuilderConfig(appBuilder));

                    await Task.Delay(15000);
                }
            });

But this doesn't seem to work.

If I do this on startup without the Task.Run/while(true)/Task.Delay, it works.

Any idea?

Thanks!