modified the ServicesCollectionExtentions to only add Singleton DiscordRestClient so that the DiscordRestClient is a singleton and we do not lose the rate limiter but the HttpClient is still regenareted every time the provider is called through the IHttpClientFactory instead of using new HttpClient(new HttpClientHandler).

src/Discord.Net.Rest/Extensions/ServiceCollectionExtensions.cs

@@ -22,7 +22,7 @@ namespace Discord.Rest.Extensions
         /// <param name="services">This is the IServiceCollection where all the services are located.</param>
         /// <param name="useProxy">Set this to true to use proxies, default is false.</param>
         /// <returns></returns>
-        public static IServiceCollection AddScopedDiscordRestClient(this IServiceCollection services, bool useProxy = false)
+        public static IServiceCollection AddDiscordRestClient(this IServiceCollection services, bool useProxy = false)
         {
             services.AddHttpClient("HttpClientFactoryRestClientProvider")
                 .ConfigurePrimaryHttpMessageHandler(() => new HttpClientHandler
@@ -35,37 +35,7 @@ namespace Discord.Rest.Extensions
 
 
             //services.AddScoped<HttpClientFactoryRestClientProvider>(provider => new HttpClientFactoryRestClientProvider(provider.GetRequiredService<IHttpClientFactory>()));
-            services.AddScoped<DiscordRestClient>(provider =>
-            {
-                var config = new DiscordRestConfig
-                {
-                    RestClientProvider = url => new HttpClientFactoryRestClient(url, provider.GetRequiredService<IHttpClientFactory>().CreateClient("HttpClientFactoryRestClientProvider"), useProxy)
-                };
-                return new DiscordRestClient(config);
-            });
-
-            return services;
-        }
-        /// <summary>
-        /// Adds the DiscordRestClient as a Transient Service to be able to use through DI.
-        /// </summary>
-        /// <param name="services">This is the IServiceCollection where all the services are located.</param>
-        /// <param name="useProxy">Set this to true to use proxies, default is false.</param>
-        /// <returns></returns>
-        public static IServiceCollection AddTransientDiscordRestClient(this IServiceCollection services, bool useProxy = false) //where should we put this useProxy options, I haven't fully understood where the original code takes this from.
-        {
-            services.AddHttpClient("HttpClientFactoryRestClientProvider")
-                .ConfigurePrimaryHttpMessageHandler(() => new HttpClientHandler
-                {
-                    AutomaticDecompression = DecompressionMethods.Deflate | DecompressionMethods.GZip,
-                    UseCookies = false,
-                    UseProxy = useProxy,
-                });
-
-
-
-            //services.AddTransient<HttpClientFactoryRestClientProvider>(provider => new HttpClientFactoryRestClientProvider(provider.GetRequiredService<IHttpClientFactory>()));
-            services.AddTransient<DiscordRestClient>(provider =>
+            services.AddSingleton<DiscordRestClient>(provider =>
             {
                 var config = new DiscordRestConfig
                 {