Check whether a username is valid or not in python (ScraGet)

main.py

from ScraGet import ScraGet 
username = ScraGet.get_user_extra()

user = input("Username to check: ").strip()
username.check_user(user)

if username.valid:
  if username.taken:
    print(f"{user} is valid but already taken")
  else:
    print(f"{user} is valid and not taken!")
else:
  print(f"{user} is invalid..")