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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 reset_key(self):
 """ Resets the app's key on the `unicore.hub` server. :returns: str -- the new key """

        new_key = self.client.reset_app_key(self.get('uuid'))
        self.data['key'] = new_key
        return new_key