update email template

app/Models/DnsDomain.php

@@ -17,6 +17,7 @@ class DnsDomain extends Model
         'dns_manager_server_id',
         'is_created',
         'plesk_id',
+        'registrar_id',
     ];
 
     public function customer()
@@ -24,6 +25,11 @@ class DnsDomain extends Model
         return $this->belongsToMany(Customer::class, 'dns_domain_user', 'domain_id', 'user_id')->withTimestamps();
     }
 
+    public function registrar()
+    {
+        return $this->belongsTo(Registrar::class);
+    }
+
     public function users()
     {
         return $this->customer();