Change default nickname

Would it be possible to change the default nickname on this community to something random, like with numbers instead of based on the e-mail address?

I just created the account and apparently it was made with my last name. I did not notice until I posted something, and then I had trouble figuring out how to change it as well (on my phone).

A simple ‘random’ nickname could fix this.

Yes you should be able to change your username under preferences.

I know, but I mean is it possible to change the default (automatic) nickname into something anonymous, with numbers for example. So the nickname before you’ve changed it into something else.