How to connect to Postgres database?

Question

PostgreSQL

Good afternoon,
Maybe someone knows how:
There is a third-party windows application that works with a PostgreSQL database. For this, 2 services are spinning, one Database server, the second as some kind of interface between the application and the database, because turning it off the application does not see the data.
I need to somehow connect to this database. More precisely, I need this base to make a .Net Web App based on it.
I already tried to change md5 to trust in the pg_hba.conf file, but I still can't connect to the database through SQL manager. And by doing this the app stops working.
Sobsno how you can find out / change the password to the database, well, or in any other way to make it possible to connect to the database.
Thanks in advance.

Answer 1

try with pgAdmin

Answer 2

Excuse me, postgre, under Windows? Try this
c:\path\to\psql.exe -U postgres
If under *nix, then so
su - postgres
psql
Well, change the pass further.

Answer 3

Show pg_hba.conf
maybe you set trust for one type of connection, but tried another?
how do you connect and what settings?
local socket, localhost(ipv4 or ipv6), real address?