Google Sheets API: The caller does not have permission

Question

I\'m trying to read the document from the cron:

https://sheets.googleapis.com/v4/spreadsheets/?key=

My document i

Answer 1

After seeing HoverPhoenix comment, I change access of My sheet to ** Anyone with link** on Viewer mode.

After changing the access it is working properly. If Data security is the concern then the best option is to use OAuth 2.0 Client IDs as credentials.