set bootstrap class in a form field SplitPhoneNumberField()

[bikash829]

Hi! I am trying to make a form using SplitPhoneNumberFiled(). Everything is working so well but i want to style those fields. And i couldn't find out how to set an attributes in a field.

 phone = SplitPhoneNumberField()
    additional_phone = SplitPhoneNumberField()
    class Meta:
        model = User
        fields = ['phone','additional_phone']

That's my code.