code: def messages(self):
          
          headers = self.headers
          r = requests.get('https://outlook.office.com/api/v2.0/me/MailFolders/' + self.id + '/messages', headers=headers)
          check_response(r)
          return Message._json_to_messages(self.account, r.json())
docs: Retrieves the messages in this Folder, 
          returning a list of :class:`Messages <pyOutlook.core.message.Message>`.