added vpn feature to mno

app/Models/NetworkOperatorConnection.php

@@ -0,0 +1,16 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+
+class NetworkOperatorConnection extends Model
+{
+    protected $table = 'network_operator_connections';
+    protected $guarded = [];
+
+    public function operator()
+    {
+        return $this->belongsTo(NetworkOperator::class, 'network_operator_id');
+    }
+}