When you create your account you specify an account URL. This is commonly based on the account name and might be something like:
https://.v2.project.co
It is possible to change the subdomain part of this. In the example above the part that can be changed is "name".
However this is something we have to do manually for you as there is no option within the app to do this.
If you would like us to change your sub domain for you then please email us at support@project.co