Add group creation and show current groups

app/Models/CrewUser.php

@@ -0,0 +1,14 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class CrewUser extends Model
+{
+    public function crew(): BelongsTo
+    {
+        return $this->belongsTo(Crew::class);
+    }
+}