users and institutions route, tests fixed

backend/database/seeders/UserPositionSeeder.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Database\Seeders;
+
+use App\Models\Lists\UserPosition;
+use Illuminate\Database\Seeder;
+
+class UserPositionSeeder extends Seeder
+{
+    /**
+     * Run the database seeds.
+     */
+    public function run(): void
+    {
+        $positions = [
+            UserPosition::PROFESSOR,
+            UserPosition::RESEARCHER,
+            UserPosition::PHD,
+            UserPosition::STUDENT,
+            UserPosition::ADMINISTRATIVE,
+        ];
+
+        foreach ($positions as $position) {
+            UserPosition::updateOrCreate(
+                ['value' => $position]
+            );
+        }
+    }
+}