Getting error everytime when i run a GAM command

Hello Mates,

We have set up the GAM project using service account creds, but I am encountering error messages when running the following commands:

- gam user xyz@cint.com show signature
- gam user xyz@cint.com print events

To troubleshoot, I have already verified the following:

- gam version, gam info domain, and gam print users work correctly.
- gam user show profile works successfully.
- The Gmail and Calendar APIs are enabled in the GCP project.
- The service account is active, and the client_id in the JSON key matches the Client ID configured in Google Workspace Domain-Wide Delegation.
- The required Gmail and Calendar scopes are configured in Domain-Wide Delegation and set as trusted under the app.
- The service account key exists in GCP.

Let me know what else i can check and make it work.

Start by reproducing `gam user xyz@cint.com show signature` and `gam user xyz@cint.com print events`, then inspect the error shown in the attached image. Compare those failures with the working `gam info domain`, `gam print users`, and `gam user show profile` commands; done means the signature and events commands run successfully with the configured service account.

Written by the indexing model from the issue text.