How to change my username?

Hi! I have been using my current name (Digifox08) for a while on the internet, but I want to change it now. The only problem is: I can’t do it myself on Gdevelop. I saw something like this on a post 2 years ago, but I didn’t want to dig it up again because there wasn’t really a clear answer. Thanks!

Anyone reading this: feel free to send me a private message with your new username, I’ll change it.