code: def add_note(self, note):
          
  
          if type(note) == str:
              return self.update_note({"content": note})
          elif (type(note) == dict) and "content" in note:
              return self.update_note(note)
          else:
              return "No string or valid note.", -1
docs: Wrapper method to add a note
  
          The method can be passed the note as a dict with the `content`
          property set, which is then directly send to the web service for
          creation. Alternatively, only the body as string can also be passed. In
          this case the parameter is used as `content` for the new note.
  
          Arguments:
              - note (dict or string): the note to add
  
          Returns:
              A tuple `(note, status)`
  
              - note (dict): the newly created note
              - status (int): 0 on success and -1 otherwise