Go to your page and type username after the URL
If you have 25 friends or followers you can select a username.
VERY IMPORTANT: once you choose this name it CANNOT be changed, so choose carefully.
Select the name and Facebook will confirm that it is available. If this is the name you want choose confirm.
If you have a business page or are the administrator to FB business or organization pages, you can choose to add a username from this screen also.
Unfortunately, the People Walking LLC does not have enough followers to have a username.