How to get the file URL from file name in Google Sheets with correct Authorization via custom function/script

Question

I would like to create a custom function that pulls a Drive URL from a file name in Google Sheets.

So, using the code below:

1. If I have a valid file nam

Answer 1

Custom functions runs as if run by a anonymous animal(user). ScriptApp.getOAuthToken will return a anonymous token without the required scopes. What you're attempting is not possible, unless the file in question is public.

References:

• Custom functions permissions
• Custom functions access services