def add_to_emails(self, *emails):
        """
        :calls: `POST /user/emails <http://developer.github.com/v3/users/emails>`_
        :param email: string
        :rtype: None
        """
        assert all(isinstance(element, (str, unicode)) for element in emails), emails
        post_parameters = emails
        headers, data = self._requester.requestJsonAndCheck(
            "POST",
            "/user/emails",
            input=post_parameters
        )
:calls: `POST /user/emails <http://developer.github.com/v3/users/emails>`_
        :param email: string
        :rtype: None