Add call to ClientHelper and expose to public API

src/Discord.Net.Rest/ClientHelper.cs

@@ -1,4 +1,4 @@
-using Discord.API.Rest;
+using Discord.API.Rest;
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.IO;
@@ -163,5 +163,11 @@ namespace Discord.Rest
             var models = await client.ApiClient.GetVoiceRegionsAsync(options).ConfigureAwait(false);
             return models.Select(x => RestVoiceRegion.Create(client, x)).FirstOrDefault(x => x.Id == id);
         }
+
+        public static async Task<int> GetRecommendShardCount(BaseDiscordClient client, RequestOptions options)
+        {
+            var response = await client.ApiClient.GetBotGatewayAsync(options);
+            return response.Shards;
+        }
     }
 }

src/Discord.Net.Rest/DiscordRestClient.cs

@@ -1,4 +1,4 @@
-using System.Collections.Generic;
+using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.IO;
 using System.Threading.Tasks;
@@ -88,6 +88,10 @@ namespace Discord.Rest
         /// <inheritdoc />
         public Task<IReadOnlyCollection<RestVoiceRegion>> GetVoiceRegionsAsync(RequestOptions options = null)
             => ClientHelper.GetVoiceRegionsAsync(this, options);
+
+        /// <inheritdoc />
+        public Task<int> GetRecommendedShardCount(RequestOptions options = null)
+            => ClientHelper.GetRecommendShardCount(this, options);
         /// <inheritdoc />
         public Task<RestVoiceRegion> GetVoiceRegionAsync(string id, RequestOptions options = null)
             => ClientHelper.GetVoiceRegionAsync(this, id, options);