Как сделать систему имени пользователя с помощью Python

Username = input("What is your username? ")
UsernameLength = len(Username)
if UsernameLength <= 10:
  print(f'Your Username is {Username}')
elif UsernameLength >= 10:
  print("Username is too long! (MAXIMUM IS 20 CHARACTERS)")
  exit()
 

Cruel Caracal