Yes, It’s possible… This is how to change username on Envato Marketplaces.
If you are going to host the forums on an independent server and have access to DNS management in your domain name registrar “forums.domain.com” would be best otherwise keep it simple with “domain.com/forums”
hope that helps
doesn’t know what he wants and expects me to do something he didn’t explicitly ask for…
btw, how to say it in Turkish?