Update backend photobooth connect API

app/Models/PhotoboothConnectCode.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class PhotoboothConnectCode extends Model
+{
+    /** @use HasFactory<\Database\Factories\PhotoboothConnectCodeFactory> */
+    use HasFactory;
+
+    protected $guarded = [];
+
+    protected $casts = [
+        'expires_at' => 'datetime',
+        'redeemed_at' => 'datetime',
+    ];
+
+    public function event(): BelongsTo
+    {
+        return $this->belongsTo(Event::class);
+    }
+}