changing the portal url

Hi,

I recently created a project on here and my team started filling in all the project details, tasks, and milestones. We're really like to change the portal URL though, because during the sign up I did not realize that that URL would be used for the whole team, so I just put my username. I'd prefer the company name to be in the portal URL. Any way to fix this? We are not willing to start from scratch with a new account.

Thanks