good

app/Models/Coupon.php

@@ -2,9 +2,20 @@
 
 namespace App\Models;
 
+use Database\Factories\CouponFactory;
+use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasOne;
 
 class Coupon extends Model
 {
+    /** @use HasFactory<CouponFactory> */
+    use HasFactory;
+
     protected $fillable = ['phone', 'code'];
+
+    public function phoneVerification(): HasOne
+    {
+        return $this->hasOne(PhoneVerification::class, 'phone', 'phone');
+    }
 }