Upon publishing your project, the default address, the URL, appears in the form:
It is possible to change the subdomain part of the link, "your-organization" in this example.
In order to do this, open the dropdown menu on your Name / Organization and select "Settings".
And update the Organization URL Snippet:
You can also get to this menu by going to "Switch Organization" on the main account menu, then hover the mouse over the organization which you want to update, and click the pencil icon:
Click here for more information about Domains settings
If you need any help, please contact support.