We currently do not have an automated method for users to change their username. However we are very happy to help with this.
Use the support button at the top of every page (or email firstname.lastname@example.org) to submit a ticket with your request. Please be sure to include both your current username and the new one you would like.
Once we receive your request, we will check to make sure that username is available, and, if it is, make the change for you. If the username is not available we will work with you to find an alternative.