code: def save(self):
          
          # First save the parent form and get the user.
          new_user = super(SignupFormExtra, self).save()
  
          new_user.first_name = self.cleaned_data['first_name']
          new_user.last_name = self.cleaned_data['last_name']
          new_user.save()
  
          # Userena expects to get the new user from this form, so return the new
          # user.
          return new_user
docs: Override the save method to save the first and last name to the user
          field.