To Change Your username that is displayed in the game, please follow below instructions:
1. Go to this link: https://wax.bloks.io/account/federation?loadContract=true&tab=Actions&scope=federation&limit=100&action=settag&__cf_chl_captcha_tk__=pmd_c9HfszB1vI6P3NXb8XLNTiBCTDfSlRJuJGszLaQX9oY-1635154336-0-gqNtZGzNA9CjcnBszQc9
2. Enter your WAX wallet into the field "account" and your desired username into the field "tag"
3. Click the "Submit Transaction" button, login to your WAX cloud wallet, and then click the button again
4. After a successful transaction you will see the green confirmation message like this below the button
5. Reload the game to see the changes.