You can update your Retro username directly within the app at any time.
Steps to Change Your Username
Open the Retro app.
Navigate to your Profile page.
Tap your username located in the upper-left area of the screen.
Select Username from the available options.
You will be taken to the Edit Username screen.
Enter your new username and save your changes.
Important Notes
Usernames must be unique. If your desired username is already in use, you'll need to choose a different one.
Once updated, your new username will be visible to your friends and other users on Retro.