Add test models to the seeders.

database/seeders/UserSeeder.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Database\Seeders;
+
+use Illuminate\Database\Console\Seeds\WithoutModelEvents;
+use Illuminate\Database\Seeder;
+use App\Models\User;
+
+class UserSeeder extends Seeder
+{
+    protected $test_user = [
+        'username' => 'Test',
+        'matrix_username' => '@test:test.com',
+        'phone' => '380661234567'
+    ];
+    /**
+     * Run the database seeds.
+     */
+    public function run(): void
+    {
+        User::factory()->create($this->test_user);
+    }
+}