Request a new username to be known by across all projects.
All of your previous contributions will be connected with this new username.
A list of requests made via this form will be made available to the users able to perform this operation. You will be notified by email when this process is completed.
If your request is related to a desire for anonymity/privacy, please note that a permanent log record will be created noting your previous name. As such, you might consider simply creating a separate and independent new account, and having your current account renamed to something random and abandoning it.