Error with postgresql in NETWORK SERVER

I´m trying to install the NETWORK SERVER on my CENTOS 8 and after the installation I have the follow error in the logs:

chirpstack-network-server[1406784]: time=“2022-01-13T20:29:45.177022322-03:00” level=warning msg=“storage: ping PostgreSQL database error, will retry in 2s” error=“pq: Ident authentication failed for user “loraserver_ns””

I’ve tried several ways to understand what’s happening but I can’t get it to run.
Is there any more complete documentation about the installation of NETWORK SERVER?
I am following this:
But I think there’s some detail that I don’t understand that needs to be done.

Or any hints of what’s going on?

Thanks for Now