Dictionary with available API parameters

        :raises ValueError: If value of __class__.params is not dictionary
        :return: Should return dict with available pushalot API methods
        :rtype: dict

def get_api_params(self):
        """Dictionary with available API parameters

        :raises ValueError: If value of __class__.params is not dictionary
        :return: Should return dict with available pushalot API methods
        :rtype: dict
        """
        result = self.params
        if type(result) != dict:
            raise ValueError(
                '{}.params should return dictionary'.format(
                    self.__class__.__name__
                )
            )
        return result