Your username is very important, and it is one of the ways that you can be easily identified on the app, as your username is unique to just you. It also helps us to resolve any technical issue on your account. You can also receive BTC and USD in-app just by providing your username. Upon signup, the app generates a username for you.
How To Get My Bitnob Username (Bitnob ID)
To get your username, log into the app. By the top left of your home page, you will see your username or Bitnob ID with the @ sign (For example, @Jon)