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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def update_account_info(self):
        ''' Update current account information

        At the moment you can only update your callback_url.

        Returns:
            An Account object

        '''
        request = self._get_request()
        return request.post(self.ACCOUNT_UPDATE_URL, {
            'callback_url': self.account.callback_url
        })