Add command to remove user's 2fa configuration. (#1094)

* Add command to remove user's 2fa configuration.

* Use collection expression, because I'm metal like that

ProjectLighthouse/Administration/Maintenance/Commands/RemoveTwoFactorCommand.cs

@@ -0,0 +1,47 @@
+#nullable enable
+using System;
+using System.Threading.Tasks;
+using LBPUnion.ProjectLighthouse.Database;
+using LBPUnion.ProjectLighthouse.Logging;
+using LBPUnion.ProjectLighthouse.Types.Entities.Profile;
+using LBPUnion.ProjectLighthouse.Types.Logging;
+using LBPUnion.ProjectLighthouse.Types.Maintenance;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace LBPUnion.ProjectLighthouse.Administration.Maintenance.Commands;
+
+public class RemoveTwoFactorCommand : ICommand
+{
+    public string Name() => "Remove Two Factor Authentication";
+    public string[] Aliases()
+        =>
+        [
+            "removeTwoFactor", "rm2fa",
+        ];
+    public string Arguments() => "<username/userId>";
+    public int RequiredArgs() => 1;
+
+    public async Task Run(IServiceProvider provider, string[] args, Logger logger)
+    {
+        DatabaseContext database = provider.GetRequiredService<DatabaseContext>();
+        UserEntity? user = await database.Users.FirstOrDefaultAsync(u => u.Username == args[0]);
+        if (user == null)
+        {
+            _ = int.TryParse(args[0], out int userId);
+            user = await database.Users.FirstOrDefaultAsync(u => u.UserId == userId);
+            if (user == null)
+            {
+                logger.LogError($"Could not find user by parameter '{args[0]}'", LogArea.Command);
+                return;
+            }
+        }
+
+        user.TwoFactorSecret = "";
+        user.TwoFactorBackup = "";
+
+        await database.SaveChangesAsync();
+
+        logger.LogSuccess($"The two factor authentication for user {user.Username} (id: {user.UserId}) has been removed.", LogArea.Command);
+    }
+}