I need to know the time that it take to a user to response an email recived from a group. To do this I want to use google api, to download all the data I need and then compare it with SQL. When I'm traying to use the api users.messeges.get() for my user, the api return me the data, but when I tried to recover other user data, i have this error:
Delegation denied for user@domain.com
I understand this error it's because I do not have enough permits, but if I use GAM ADV with my user I can download all the data I need. The SCOPE I'm actually using is:
https://www.googleapis.com/auth/gmail.metadata
Any advice for me? I'm stack