I've started a website but my username was not to my liking and so i've decided to change it.
So I deleted wordpress from the installed applications and installed it again. But apparently I can't access wordpress to edit my site anymore, not with the old password nor with the new one.

Is there something I can do about it?

Below goes the message that apears:

Object not found!
The requested URL was not found on this server. The link on the referring page seems to be wrong or outdated. Please inform the author of that page about the error.

If you think this is a server error, please contact the webmaster.

Error 404
xxxxxx.com
Apache

Thanks in advance for your help