Pgscv ignores `databases` regular expression when tries to discover pg_stat_statements extension

[nazipov]

Describe the bug
Pgscv ignores databases regular expression when tries to discover pg_stat_statements extension. https://github.com/lesovsky/pgscv/blob/master/internal/collector/config.go#L185

Steps to reproduce
Add aws rds to dictionary services.

Expected behavior
Pgscv should check that database match with regex on pg_stat_statements discovering before connecting to this database.

pgSCV startup options
Config file

listen_address: 127.0.0.1:9890
autoupdate: off
no_track_mode: false
databases: "^(app_database_1|app_database_2)$"
services:
  "aws_rds":
    service_type: "postgres"
    conninfo: "postgres://pgscv:XXXXXX@rds-host/postgres"

Errors and Logs
Aws rds logs

2022-11-12 17:00:54 UTC:10.2.10.20(49376):pgscv@rdsadmin:[28030]:FATAL: pg_hba.conf rejects connection for host "X.X.X.X", user "pgscv", database "rdsadmin", SSL on

Pgscv logs

{"level":"warn","service":"pgscv","time":"2022-11-17T14:00:55Z","message":"connect to database 'rdsadmin' failed: failed to connect to `host=rds-host user=pgscv database=rdsadmin`: server error (FATAL: pg_hba.conf rejects connection for host \"X.X.X.X\", user \"pgscv\", database \"rdsadmin\", SSL on (SQLSTATE 28000)); skip"}

Additional context
It's not critical issue, but such kind of behavior creates a lot of flood in aws rds logs and it's not possible to fix it.

[lesovsky]

The error means you use invalid credentials to connect to Postgres. Check the conninfo.

upd. Could you paste more pgscv logs immediately after start?

[nazipov]

Yes, It's related to invalid credentials, but in AWS RDS (I use pgscv to monitor our AWS RDS instances) no one can access to rdsadmin database, except RDS system users.

app_database_1=> \l
                                  List of databases
   Name    |  Owner   | Encoding |   Collate   |    Ctype    |   Access privileges
-----------+----------+----------+-------------+-------------+-----------------------
.............
 postgres  | root     | UTF8     | en_US.UTF-8 | en_US.UTF-8 |
 rdsadmin  | rdsadmin | UTF8     | en_US.UTF-8 | en_US.UTF-8 | rdsadmin=CTc/rdsadmin+
           |          |          |             |             | rdstopmgr=Tc/rdsadmin
.............