def app_public_key(self, id, **kwargs):
        "https://developer.zendesk.com/rest_api/docs/core/apps#get-app-public-key"
        api_path = "/api/v2/apps/{id}/public_key.pem"
        api_path = api_path.format(id=id)
        return self.call(api_path, **kwargs)
https://developer.zendesk.com/rest_api/docs/core/apps#get-app-public-key