Renames the Folder to the provided name.

        Args:
            new_folder_name: A string of the replacement name.

        Raises:
            AuthError: Raised if Outlook returns a 401, generally caused by an invalid or expired access token.

        Returns:
            A new Folder representing the folder with the new name on Outlook.

def rename(self, new_folder_name):
        """Renames the Folder to the provided name.

        Args:
            new_folder_name: A string of the replacement name.

        Raises:
            AuthError: Raised if Outlook returns a 401, generally caused by an invalid or expired access token.

        Returns:
            A new Folder representing the folder with the new name on Outlook.

        """
        headers = self.headers
        endpoint = 'https://outlook.office.com/api/v2.0/me/MailFolders/' + self.id
        payload = '{ "DisplayName": "' + new_folder_name + '"}'

        r = requests.patch(endpoint, headers=headers, data=payload)

        if check_response(r):
            return_folder = r.json()
            return self._json_to_folder(self.account, return_folder)