PostgreSQL 16 connection error

Doesn't connect to PostgreSQL 16:

```
'ServerManager' object has no attribute 'user_info'
```

See https://stackoverflow.com/questions/69378663/how-can-i-solve-servermanager-object-has-no-attribute-user-info-error-in-pos


```sql
% SELECT VERSION();
PostgreSQL 16.1 (Ubuntu 16.1-1.pgdg22.04+1) on x86_64-pc-linux-gnu, compiled by gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0, 64-bit
```