Shove in support for changing own nick (through `User.Edit(nickname:))`

src/Discord.Net.Net45/API/Client/Rest/UpdateOwnNick.cs

@@ -0,0 +1,23 @@
+using Newtonsoft.Json;
+
+namespace Discord.API.Client.Rest
+{
+    [JsonObject(MemberSerialization.OptIn)]
+    public class UpdateOwnNick : IRestRequest
+    {
+        string IRestRequest.Method => "PATCH";
+        string IRestRequest.Endpoint => $"guilds/{GuildId}/members/@me/nick";
+        object IRestRequest.Payload => this;
+
+        public ulong GuildId { get; set; }
+
+        [JsonProperty("nick")]
+        public string Nickname { get; set; }
+
+        public UpdateOwnNick(ulong guildId, string nickname)
+        {
+            GuildId = guildId;
+            Nickname = nickname;
+        }
+    }
+}

src/Discord.Net.Net45/Discord.Net.csproj

@@ -601,6 +601,7 @@
     <Compile Include="..\Discord.Net\TaskManager.cs">
       <Link>TaskManager.cs</Link>
     </Compile>
+    <Compile Include="API\Client\Rest\UpdateOwnNick.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
   </ItemGroup>
   <ItemGroup>

src/Discord.Net/Models/User.cs

@@ -258,6 +258,15 @@ namespace Discord
                 .Distinct()
                 .ToArray();
 
+            var tasks = new List<Task>();
+            if (nickname != null && this == Server.CurrentUser)
+            {
+                var task = Client.ClientAPI.Send(new UpdateOwnNick(Server.Id, nickname));
+                if (isMuted == null && isDeafened == null && voiceChannel == null && roles == null)
+                    return task;
+                tasks.Add(task);
+                nickname = null;
+            }
             var request = new UpdateMemberRequest(Server.Id, Id)
             {
                 IsMuted = isMuted ?? IsServerMuted,
@@ -266,7 +275,8 @@ namespace Discord
                 RoleIds = roleIds,
                 Nickname = nickname ?? Nickname
             };
-            return Client.ClientAPI.Send(request);
+            tasks.Add(Client.ClientAPI.Send(request));
+            return Task.WhenAll(tasks);
         }
         
         public Task Kick()