How to return QString from function

[Rondle]

Hi, I want to return QString from this function:

QString MainWindow::postLogin(QNetworkReply *reply)
{
QString token;
 
(...)
 
return token;
}

QString MainWindow::postLogin(QNetworkReply *reply)
{
QString token;

(...)

return token;
}

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Is this good way? And how can i call the function and use this QString value in my main program?

Thanks