I am integrating Zoho CRM with Google Drive, I am able to connect my Zoho application with google drive. Now I want to extract access_token and refresh_token from the google drive authorization url which consist of authorization code. I can manully extract the tokens, but I want to build an integration between both applications for different user so different user will have different authorization code right? So I want to get tokens in generic for every user so I need to code for it but I am unable to get tokens via my google appscript code or zoho crm custom function i.e. deluge programming.