using cloude sonet 3.5 i have used the prompt to create the migrations and their files and installed api package

app/Models/UserRelationship.php

@@ -0,0 +1,49 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class UserRelationship extends Model
+{
+    use HasFactory;
+
+    /**
+     * The attributes that are mass assignable.
+     *
+     * @var array<int, string>
+     */
+    protected $fillable = [
+        'guardian_user_id',
+        'dependent_user_id',
+        'relationship_type',
+        'is_billing_contact',
+    ];
+
+    /**
+     * The attributes that should be cast.
+     *
+     * @var array<string, string>
+     */
+    protected $casts = [
+        'is_billing_contact' => 'boolean',
+    ];
+
+    /**
+     * Get the guardian user that owns the relationship.
+     */
+    public function guardian(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'guardian_user_id');
+    }
+
+    /**
+     * Get the dependent user that belongs to the relationship.
+     */
+    public function dependent(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'dependent_user_id');
+    }
+}