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[rafaelramos]

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[kusti8]

You cannot without asking a mod. Just stick with it or create a new account. It's the easiest.

[mahjongg]

Even a mod cannot do what you want, simply abandon you old username, and create a new one.

[DougieLawson]

Even a mod cannot do what you want, simply abandon you old username, and create a new one.

Liz can change it, she's a site admin.

[W. H. Heydt]

Even a mod cannot do what you want, simply abandon you old username, and create a new one.

Liz can change it, she's a site admin.

Anyone who can write directly to that database column should be able to change it. Which is to say, anyone who has "root" access.

[Heater]

Keep life simple.

Create a new account with whatever name you like.

Forget the old one.

Job done.