Get a user's info.

        :param id: ID of the user in question
        :return: User object. None if not found

def get_user(self, id):
        """
        Get a user's info.

        :param id: ID of the user in question
        :return: User object. None if not found
        """
        try:
            return User(self._client.get_user(user_id=id)._json)
        except TweepError as e:
            if e.api_code == TWITTER_USER_NOT_FOUND_ERROR:
                return None
            raise