# USER MODEL
    public function accounting()
    {
        return $this->hasMany('App\Accounting', 'userid', 'userid');
    }

    public function isOnline()
    {
        $usersAccounts = $this->accounting;

        return $lastAccount = $usersAccounts->last();
        if ($lastAccount) {
            return $lastAccount->rtype;
        }
        return 'oops';
    }

# CONTROLLER

        $builder = App\User::with('accounting:rtype')
        ->ofType($filterRealm);

        return $datatables->eloquent($builder)
            ->addColumn('info', function (App\User $user) {
                $info = [];

                $info[] = $user->isOnline();

                return implode(' ', $info);
            })