code: def create(self, data):
          
          self.app_id = None
          if 'client_id' not in data:
              raise KeyError('The authorized app must have a client_id')
          if 'client_secret' not in data:
              raise KeyError('The authorized app must have a client_secret')
          return self._mc_client._post(url=self._build_path(), data=data)
docs: Retrieve OAuth2-based credentials to associate API calls with your
          application.
  
          :param data: The request body parameters
          :type data: :py:class:`dict`
          data = {
              "client_id": string*,
              "client_secret": string*
          }