function setup()
    {
        //Now you can use Eloquent inside query() like you normally do
        $this->src("elo")->query(
            RegisterRecord::with([
            'register:id,name', 'user:id,name',
            'closedByUser:id,name', 'location:id,name'])
        )->pipe($this->dataStore("registers"));

"dataSource"=>$this->dataStore("registers"),
            "columns"=>array(

how to specify users.name in columns array how to access it ?