How to attach a file from zoho workdrive when i send and email

hi i have a question how can i attach a file when i send an email this is my code

i made an invoke url but doesn´t work or doesnt attach the file that i have on workdrive

thanks

etiqueta = invokeUrl

[

url: "https://workdrive.zohoexternal.com/external/52nKCovLv7b-LNLhw"

type: GET

];

sendmail

[

from :zoho.adminuserid

to :input.correo_electr_nico

subject :"tus folios de certificados de la solicitud número " + input.Numero_de_solicitud + " han sido asignados"

message :"<div></p></div>"

Attachments :template:Solicitud_de_Certificado as PDF

Attachments :file:etiqueta

]