public static DIHelper AddAccountLinker(this DIHelper services)
        {
            services.TryAddScoped <AccountLinker>();
            services.TryAddScoped <IConfigureOptions <AccountLinker>, ConfigureAccountLinker>();

            return(services
                   .AddAccountLinkContextService()
                   .AddSignatureService()
                   .AddInstanceCryptoService()
                   .AddAccountLinkerStorageService());
        }