Accesses the branch API
        :param method: The HTTP method
        :param url: The URL
        :param json_params: JSON parameters
        :return: The parsed response

def make_api_call(self, method, url, json_params=None):
        """
        Accesses the branch API
        :param method: The HTTP method
        :param url: The URL
        :param json_params: JSON parameters
        :return: The parsed response
        """

        url = self.BRANCH_BASE_URI+url

        if self.verbose is True:
            print("Making web request: {}".format(url))

        if json_params is not None:
            encoded_params = json.dumps(json_params)
            headers = {'Content-Type': 'application/json'}
        else:
            encoded_params = None
            headers = {}

        if encoded_params is not None and self.verbose is True:
            print("Params: {}".format(encoded_params))

        request = Request(url, encoded_params.encode('utf-8'), headers)
        request.get_method = lambda: method
        response = urlopen(request).read()
        return json.loads(response.decode('utf-8'))