Help in changing account username

I want to change my username as it got all wrong when I linked my account with google.

In order to save a copy of the log, follow this guide:
https://community.citra-emu.org/t/how-to-upload-the-log-file/296

To be clear, is it your forum username that you want changed?

yes it is my forum username

What do you want it to be changed to?