Enhance nodelist import

app/Models/System.php

@@ -47,6 +47,11 @@ class System extends Model
 		return $this->hasOne(Setup::class);
 	}
 
+	public function users()
+	{
+		return $this->belongsToMany(User::class);
+	}
+
 	/**
 	 * This system is the ZC for the following zones
 	 */