Add logout command

Author: calebkiage

src/Authentication/ILoginService.cs

@@ -4,6 +4,4 @@ namespace Microsoft.Graph.Cli.Authentication;
 
 interface ILoginService {
     Task LoginAsync(string[] scopes);
-
-    void Logout();
 }

src/Authentication/LoginServiceBase.cs

@@ -11,12 +11,6 @@ public async Task LoginAsync(string[] scopes) {
         await this.SaveSessionAsync(record);
     }
 
-    public void Logout() {
-        if (File.Exists(Constants.AuthRecordPath)) {
-            File.Delete(Constants.AuthRecordPath);
-        }
-    }
-
     protected abstract Task<AuthenticationRecord> DoLoginAsync(string[] scopes);
 
     public async Task SaveSessionAsync(AuthenticationRecord record) {

src/Authentication/LogoutService.cs

@@ -0,0 +1,12 @@
+using System.IO;
+using Microsoft.Graph.Cli.Utils;
+
+namespace Microsoft.Graph.Cli.Authentication;
+
+public class LogoutService {
+    public void Logout() {
+        if (File.Exists(Constants.AuthRecordPath)) {
+            File.Delete(Constants.AuthRecordPath);
+        }
+    }
+}

src/Commands/Authentication/LogoutCommand.cs

@@ -0,0 +1,26 @@
+using Microsoft.Graph.Cli.Authentication;
+using Microsoft.Graph.Cli.Utils;
+using System.CommandLine;
+using System.CommandLine.Invocation;
+
+namespace Microsoft.Graph.Cli.Commands.Authentication;
+
+class LogoutCommand
+{
+    private readonly LogoutService logoutService;
+
+    public LogoutCommand(LogoutService logoutService) {
+        this.logoutService = logoutService;
+    }
+
+    public Command Build() {
+        var logoutCommand = new Command("logout", "Logout by deleting the stored session used in commands");
+
+        logoutCommand.Handler = CommandHandler.Create(() =>
+        {
+            this.logoutService.Logout();
+        });
+
+        return logoutCommand;
+    }
+}

src/Program.cs

@@ -25,6 +25,9 @@ static async Task<int> Main(string[] args) {
 
             var loginCommand = new LoginCommand(authServiceFactory);
             rootCommand.AddCommand(loginCommand.Build());
+
+            var logoutCommand = new LogoutCommand(new LogoutService());
+            rootCommand.AddCommand(logoutCommand.Build());
             return await rootCommand.InvokeAsync(args);
         }
     }