Add ability to invite users

app/Http/Requests/InviteUserFormRequest.php

@@ -0,0 +1,43 @@
+<?php
+/*
+ * InviteUserFormRequest.php
+ * Copyright (c) 2022 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\Http\Requests;
+
+use FireflyIII\Support\Request\ChecksLogin;
+use FireflyIII\Support\Request\ConvertsDataTypes;
+use Illuminate\Foundation\Http\FormRequest;
+
+class InviteUserFormRequest extends FormRequest
+{
+    use ConvertsDataTypes, ChecksLogin;
+
+    /**
+     * Rules for this request.
+     *
+     * @return array
+     */
+    public function rules(): array
+    {
+        return [
+            'invited_user' => 'required|email|unique:invited_users,email',
+        ];
+    }
+}