code: def _create_user(
              self, username, email, short_name, full_name,
              institute, password, is_admin, **extra_fields):
          
  
          # Create Person
          person = self.model(
              username=username, email=email,
              short_name=short_name, full_name=full_name,
              is_admin=is_admin,
              institute=institute,
              **extra_fields
          )
          person.set_password(password)
          person.save()
          return person
docs: Creates a new active person.