How to SETUP USERNAME in SPAMAPP?

so to set up username in spam app basically i'm not sure you can do it in the app itself uh because you should do it when you create your account so basically just create your account you need to verify your us phone number get a text message and then you can set up a username so that's the process and yeah after that you just can set up usernames and hurry up you can still add it and get like your first name username because there aren't that many users but this app is in the top charts right now because it's what went viral on ticktalk but yeah so it's not possible to change it uh later or anything you can still add like your instagram username tick talk snapchat twitter all of that but not your username in this app so that's that hope that is helpful