Cron job execution requires login permission

I'm getting the following error message when trying my cron job tries to execute:
```
postgres_1 | 2021-06-04 08:57:00.006 UTC [32] LOG: cron job 3 starting: CALL my_proc('foobar')
postgres_1 | 2021-06-04 08:57:00.020 UTC [55] FATAL: role "group.readwrite" is not permitted to log in
postgres_1 | 2021-06-04 08:57:00.021 UTC [32] LOG: cron job 3 connection failed
```
The cron job runs fine if I add login permission to the user with which the job executes .
However, I'm trying to adhere to the principle of least-privilege, so I'd prefer not to add the login permissions.

Would it be possible to change this extension to allow running cron jobs with user accounts that don't have login permission?