In order to create a subdomain for your project, if you already have been sent a $WRITE token:
1. Make sure you have a $WRITE token in the wallet that you would like to be the owner account of the project.
2. With that account, navigate to mirror.xyz/join, connect that wallet, fill in the subdomain you would like, and burn the $WRITE token to register the subdomain.
3. If after burning the token and successfully completing the transaction, your URL does not change to <your-subdomain>.mirror.xyz, please reach out to Support.
If you have not been sent a $WRITE token, you can follow the instructions here to request one.