code: def update_key(self, id_number, new_key, metadata=None):
          
          data = {
              'id': id_number,
              'new_key': new_key
          }
  
          if metadata is not None:
              data['metadata'] = metadata
  
          return self.post('updateKey', data)
docs: Update a canned key
  
          :type id_number: int
          :param id_number: canned key ID number
  
          :type new_key: str
          :param new_key: New canned key value
  
          :type metadata: str
          :param metadata: Optional metadata
  
          :rtype: dict
          :return: an empty dictionary