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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 get_client_id(self):
 """ Return the client id that should have all the needed scopes and authorities for the services in this manifest. """

        self._client_id = predix.config.get_env_value(predix.app.Manifest, 'client_id')
        return self._client_id