@classmethod
def get_preview_url(cls, token):
    return (f'{settings.GRAPPLE_PREVIEW_URL}?' + urllib.parse.urlencode({'content_type': ((cls._meta.app_label + '.') + cls.__name__.lower()), 'token': token}))
@classmethod
def get_preview_url(cls, token):
    return (f'{settings.GRAPPLE_PREVIEW_URL}?' + urllib.parse.urlencode({'content_type': ((cls._meta.app_label + '.') + cls.__name__.lower()), 'token': token}))