You can personalize your username by selecting the three-bar menu icon located in the top left corner of the Disney Pinnacle by Dapper Labs mobile app. This will bring up the following screen:
From there, select Account Center, and you will be taken to your Dapper Wallets Account Settings tab. You may be prompted to sign in again using your existing Disney Pinnacle by Dapper Labs credentials.
After reaching the screen below, you can personalize your username by selecting Edit next to the pencil icon under the Username section.
After personalizing your username, select Save Changes to confirm the updates. Please note that it may take some time for your username to reflect the changes once submitted.