Added REST Ban model

src/Discord.Net/API/Common/Ban.cs

@@ -1,9 +1,13 @@
 #pragma warning disable CS1591
+using Newtonsoft.Json;
+
 namespace Discord.API
 {
     public class Ban
     {
+        [JsonProperty("user")]
         public User User { get; set; }
+        [JsonProperty("reason")]
         public string Reason { get; set; }
     }
 }

src/Discord.Net/API/DiscordRestApiClient.cs

@@ -440,11 +440,11 @@ namespace Discord.API
         }
 
         //Guild Bans
-        public async Task<IReadOnlyCollection<User>> GetGuildBansAsync(ulong guildId, RequestOptions options = null)
+        public async Task<IReadOnlyCollection<Ban>> GetGuildBansAsync(ulong guildId, RequestOptions options = null)
         {
             Preconditions.NotEqual(guildId, 0, nameof(guildId));
 
-            return await SendAsync<IReadOnlyCollection<User>>("GET", $"guilds/{guildId}/bans", options: options).ConfigureAwait(false);
+            return await SendAsync<IReadOnlyCollection<Ban>>("GET", $"guilds/{guildId}/bans", options: options).ConfigureAwait(false);
         }
         public async Task CreateGuildBanAsync(ulong guildId, ulong userId, CreateGuildBanParams args, RequestOptions options = null)
         {

src/Discord.Net/Entities/Guilds/Ban.cs

@@ -0,0 +1,20 @@
+using System.Diagnostics;
+
+namespace Discord
+{
+    [DebuggerDisplay(@"{DebuggerDisplay,nq}")]
+    public struct Ban
+    {
+        public IUser User { get; }
+        public string Reason { get; }
+
+        public Ban(IUser user, string reason)
+        {
+            User = user;
+            Reason = reason;
+        }
+
+        public override string ToString() => User.ToString();
+        private string DebuggerDisplay => $"{User}: {Reason}";
+    }
+}

src/Discord.Net/Entities/Guilds/IGuild.cs

@@ -61,7 +61,7 @@ namespace Discord
         Task LeaveAsync();
 
         /// <summary> Gets a collection of all users banned on this guild. </summary>
-        Task<IReadOnlyCollection<IUser>> GetBansAsync();
+        Task<IReadOnlyCollection<Ban>> GetBansAsync();
         /// <summary> Bans the provided user from this guild and optionally prunes their recent messages. </summary>
         Task AddBanAsync(IUser user, int pruneDays = 0);
         /// <summary> Bans the provided user id from this guild and optionally prunes their recent messages. </summary>

src/Discord.Net/Rest/Entities/Guilds/Guild.cs

@@ -157,10 +157,10 @@ namespace Discord
             await Discord.ApiClient.DeleteGuildAsync(Id).ConfigureAwait(false);
         }
         
-        public async Task<IReadOnlyCollection<IUser>> GetBansAsync()
+        public async Task<IReadOnlyCollection<Ban>> GetBansAsync()
         {
             var models = await Discord.ApiClient.GetGuildBansAsync(Id).ConfigureAwait(false);
-            return models.Select(x => new User(x)).ToImmutableArray();
+            return models.Select(x => new Ban(new User(x.User), x.Reason)).ToImmutableArray();
         }
         public Task AddBanAsync(IUser user, int pruneDays = 0) => AddBanAsync(user, pruneDays);
         public async Task AddBanAsync(ulong userId, int pruneDays = 0)