Implement AuthService and ApiClient core logic

Models/TextChannelServiceModels.cs

@@ -0,0 +1,27 @@
+using Chtn.CSharp.SDK.Models.Common;
+using Newtonsoft.Json;
+using System.Collections.Generic;
+
+namespace Chtn.CSharp.SDK.Models.Chat.TextChannel
+{
+    public class ChannelMessage
+    {
+        [JsonProperty("msgid")] public string MsgId { get; set; }
+        [JsonProperty("author")] public PublicUserData Author { get; set; }
+        [JsonProperty("message")] public string Message { get; set; }
+        [JsonProperty("channelId")] public string ChannelId { get; set; }
+        [JsonProperty("files")] public List<Attachment> Files { get; set; }
+    }
+
+    public class ChannelPinMessageReq
+    {
+        [JsonProperty("channelId")] public string ChannelId { get; set; }
+        [JsonProperty("messageId")] public string MessageId { get; set; }
+    }
+
+    public class ChannelJoinWsRoomReq
+    {
+        [JsonProperty("connId")] public string ConnId { get; set; }
+        [JsonProperty("channelId")] public string ChannelId { get; set; }
+    }
+}