code: def add_key(self, key, metadata=""):
          
          data = {
              'key': key,
              'metadata': metadata
          }
  
          return self.post('createKey', data)
docs: Add a canned key
  
          :type key: str
          :param key: New canned key
  
          :type metadata: str
          :param metadata: Optional metadata
  
          :rtype: dict
          :return: A dictionnary containing canned key description