Fixed.

src/Swarm.NET/Endpoints/ApiBase.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace SwarmDotNET.Endpoints
+{
+    public abstract class ApiBase
+    {
+        // 限定公開プロパティ
+
+        protected SwarmService ParentService
+        {
+            get;
+            private set;
+        }
+
+
+        // コンストラクタ
+
+        public ApiBase(SwarmService parentService)
+        {
+            this.ParentService = parentService;
+        }
+    }
+}

src/Swarm.NET/Endpoints/VenuesApi.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace SwarmDotNET.Endpoints
+{
+    public class VenuesApi : ApiBase
+    {
+        public VenuesApi(SwarmService parentService)
+            : base(parentService)
+        {
+
+        }
+    }
+}

src/Swarm.NET/Swarm.NET.projitems

@@ -9,6 +9,8 @@
     <Import_RootNamespace>SwarmDotNET</Import_RootNamespace>
   </PropertyGroup>
   <ItemGroup>
+    <Compile Include="$(MSBuildThisFileDirectory)Endpoints\ApiBase.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Endpoints\VenuesApi.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Entities\UserAccessToken.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)InternalUtilities\UriUtils.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)SwarmClientInfo.cs" />

src/Swarm.NET/SwarmService.cs

@@ -6,6 +6,7 @@
 using System.Threading.Tasks;
 
 using Newtonsoft.Json;
+using Newtonsoft.Json.Bson;
 using SwarmDotNET.Entities;
 using SwarmDotNET.InternalUtilities;
 
@@ -88,6 +89,11 @@ public async Task AuthorizeWithCodeAsync(string code)
             }
         }
 
+        public void AuthorizeWithUserAccessToken(UserAccessToken accessToken)
+        {
+            this.AccessToken = accessToken;
+        }
+
         public void Dispose()
         {
             this._httpClient.Dispose();

src/Tests/Swarm.NET.Demo/Program.cs

@@ -1,6 +1,8 @@
 using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
+using System.Management.Instrumentation;
 using System.Security.Cryptography.X509Certificates;
 using System.Text;
 using System.Threading.Tasks;
@@ -11,18 +13,30 @@ class Program
     {
         static void Main(string[] args)
         {
-            using (var swService = new SwarmService(new SwarmClientInfo()
+            var datFilePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.UserProfile), "Swarm.NET.dat");
+
+            if (File.Exists(datFilePath) == false)
             {
-                ClientId = "KWCZOZ5S5WGXNE054WLHNWZ0BJNRMHRS5FOCZASF15JRPQUP",
-                ClientSecret = "1I1CGA0UTKS2T0WFWPZR5YNN0QHFY3M2XSKFWS5RA34XNCXN",
-                AuthorizationRedirectUri = new Uri("http://www.a32kita.net/dummy/fsqauth"),
-            }))
+                Console.WriteLine("Please put client info file.");
+                Console.WriteLine(datFilePath);
+                Environment.Exit(1);
+            }
+
+            var clientInfo = new SwarmClientInfo();
+            using (var sr = new StreamReader(File.OpenRead(datFilePath)))
+            {
+                clientInfo.ClientId = sr.ReadLine();
+                clientInfo.ClientSecret = sr.ReadLine();
+                clientInfo.AuthorizationRedirectUri = new Uri(sr.ReadLine());
+            }
+
+            using (var swService = new SwarmService(clientInfo))
             {
                 Console.WriteLine("Please authorize this client;");
                 Console.WriteLine(swService.GetAuthorizationUri());
                 Console.WriteLine();
                 Console.WriteLine("Please input redirected uri;");
-                
+
                 Console.Write("> ");
                 var redirectedUri = Console.ReadLine();