code: def prepare_zoho_headers(token, headers=None):
          
          headers = headers or {}
          headers["Authorization"] = "{token_header} {token}".format(
              token_header=ZOHO_TOKEN_HEADER, token=token
          )
          return headers
docs: Add a `Zoho Token`_ to the request URI.
          Recommended method of passing bearer tokens.
  
          Authorization: Zoho-oauthtoken h480djs93hd8
  
          .. _`Zoho-oauthtoken Token`: custom zoho token