docs: def create_child_folder(self, folder_name):
          """Creates a child folder within the Folder it is called from and returns the new Folder object.
  
          Args:
              folder_name: The name of the folder to create
  
          Returns: :class:`Folder <pyOutlook.core.folder.Folder>`
          """
          headers = self.headers
          endpoint = 'https://outlook.office.com/api/v2.0/me/MailFolders/' + self.id + '/childfolders'
          payload = '{ "DisplayName": "' + folder_name + '"}'
  
          r = requests.post(endpoint, headers=headers, data=payload)
  
          if check_response(r):
              return_folder = r.json()
              return self._json_to_folder(self.account, return_folder)