Хеширование пароля в кастомной модели пользователя

class UserPostSerializer(serializers.ModelSerializer):

    class Meta:
        model = User
        fields = ('id', 'phone_number', 'active', 'password',
                  'first_name', 'last_name', 'email', 'groups')

    def create(self, validated_data):
        user = super(UserPostSerializer, self).create(validated_data)
        user.set_password(validated_data['password'])
        user.save()
        return user

    def update(self, instance, validated_data):
        if validated_data.get('password'):
            instance.set_password(validated_data['password'])
            instance.save()
        return instance