def to_user(self, user=None):
if not user:
user = User()
user.first_name = self.first_name.data
user.last_name = self.last_name.data
user.phone_number = self.phone_number.data
user.birthdate = self.birthdate.data
user.gender = Gender.Male if self.gender.data == '1' else Gender.Female
return user
