def register_user(cls, username: str, email: str, password: str,
filename: str) -> bool:
if not Utils.is_email_safe(email):
raise UserErrors.InvalidEmailAddess('invalid email address')
try:
user = cls.find_by_email(email)
raise UserErrors.UserAlreadyExit(
'user with this email already exits')
except UserErrors.UserNotFound:
UserModel(username, email, Utils.create_hashed_password(password),
filename).save_to_mongo()
return True
