Get info of a specific user.
        :param username: the username of the user to get info about
        :return:

def user_info(self, username):
        """
        Get info of a specific user.
        :param username: the username of the user to get info about
        :return:
        """
        request_url = "{}/api/0/user/{}".format(self.instance, username)

        return_value = self._call_api(request_url)

        return return_value