Played around with a new app structure

app/Access/Controllers/MfaController.php

@@ -0,0 +1,73 @@
+<?php
+
+namespace BookStack\Access\Controllers;
+
+use BookStack\Access\Mfa\MfaValue;
+use BookStack\Activity\ActivityType;
+use BookStack\Http\Controllers\Controller;
+use Illuminate\Http\Request;
+
+class MfaController extends Controller
+{
+    use HandlesPartialLogins;
+
+    /**
+     * Show the view to setup MFA for the current user.
+     */
+    public function setup()
+    {
+        $userMethods = $this->currentOrLastAttemptedUser()
+            ->mfaValues()
+            ->get(['id', 'method'])
+            ->groupBy('method');
+
+        $this->setPageTitle(trans('auth.mfa_setup'));
+
+        return view('mfa.setup', [
+            'userMethods' => $userMethods,
+        ]);
+    }
+
+    /**
+     * Remove an MFA method for the current user.
+     *
+     * @throws \Exception
+     */
+    public function remove(string $method)
+    {
+        if (in_array($method, MfaValue::allMethods())) {
+            $value = user()->mfaValues()->where('method', '=', $method)->first();
+            if ($value) {
+                $value->delete();
+                $this->logActivity(ActivityType::MFA_REMOVE_METHOD, $method);
+            }
+        }
+
+        return redirect('/mfa/setup');
+    }
+
+    /**
+     * Show the page to start an MFA verification.
+     */
+    public function verify(Request $request)
+    {
+        $desiredMethod = $request->get('method');
+        $userMethods = $this->currentOrLastAttemptedUser()
+            ->mfaValues()
+            ->get(['id', 'method'])
+            ->groupBy('method');
+
+        // Basic search for the default option for a user.
+        // (Prioritises totp over backup codes)
+        $method = $userMethods->has($desiredMethod) ? $desiredMethod : $userMethods->keys()->sort()->reverse()->first();
+        $otherMethods = $userMethods->keys()->filter(function ($userMethod) use ($method) {
+            return $method !== $userMethod;
+        })->all();
+
+        return view('mfa.verify', [
+            'userMethods'  => $userMethods,
+            'method'       => $method,
+            'otherMethods' => $otherMethods,
+        ]);
+    }
+}