Your username is the name that will appear above your avatar in-world. It is also the name that will appear on the website once you are logged-in.
Usernames are registered in the $NAME contract on chain are are therefore Non-Fungible tokens.
In Register Name, enter the name you would like to have and press
register name. A metamask window should pop-up to confirm the transaction. Once confirmed, the name will be minted and you should have a notification telling you the minting finished successfully.
If your transaction has been refused, it is highly likely that the name you have entered has already been taken or that it does pass the validation test.
Make sure it has a maximum length of 16 characters, contains only a-z, A-Z, 0-9, hyphen and underscore.
After a successful transaction, refresh the page and you should see your name popup in the Switch names section of the page.
To select a desired name, check its checkbox and press