Use trait, not class extension as an experiment.

app/Http/Requests/BudgetFormStoreRequest.php

@@ -22,17 +22,19 @@ declare(strict_types=1);
 
 namespace FireflyIII\Http\Requests;
 
+use FireflyIII\Support\Request\ChecksLogin;
 use FireflyIII\Support\Request\ConvertsDataTypes;
 use FireflyIII\Validation\AutoBudget\ValidatesAutoBudgetRequest;
+use Illuminate\Foundation\Http\FormRequest;
 use Illuminate\Validation\Validator;
 
 /**
  * @codeCoverageIgnore
  * Class BudgetFormStoreRequest
  */
-class BudgetFormStoreRequest extends LoggedInRequest
+class BudgetFormStoreRequest extends FormRequest
 {
-    use ConvertsDataTypes, ValidatesAutoBudgetRequest;
+    use ConvertsDataTypes, ValidatesAutoBudgetRequest, ChecksLogin;
 
     /**
      * Returns the data required by the controller.

app/Support/Request/ChecksLogin.php

@@ -0,0 +1,40 @@
+<?php
+declare(strict_types=1);
+/*
+ * ChecksLogin.php
+ * Copyright (c) 2020 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+namespace FireflyIII\Support\Request;
+
+/**
+ * Trait ChecksLogin
+ */
+trait ChecksLogin
+{
+    /**
+     * Verify the request.
+     *
+     * @return bool
+     */
+    public function authorize(): bool
+    {
+        // Only allow logged in users
+        return auth()->check();
+    }
+}