You can modify the User Name your registered in the VeriFLY mobile app, via the Settings menu.
To change your VeriFLY User Name:
From the Home screen, tap the menu button in the top-left (3 lines).
Under Profile, tap your name.
Under Profile, tap User Name and update your First / Last name on the next page.
Please be aware that the name you enter here, should be the same name used when purchasing tickets for your flight.