How to debug authentication issues in Postgres

I have a remote database which I can connect to using psql command line
tool as well as PgAdmin4. But I would really like to use DataGrip. But
whenever I try to connect, it gives me fatal: password authentication
failed and prompts me for another password. I raised an issue in DataGrip
and I was told there is an issue in my database configuration.

Here is my pg_hba.conf:
```
# TYPE DATABASE USER ADDRESS METHOD

# "local" is for Unix domain socket connections only
local all all peer
# IPv4 local connections:
host all all 127.0.0.1/32
scram-sha-256
# IPv4 connections from internet
host database user 0.0.0.0/0 scram-sha-256
host database user 0.0.0.0/0 md5
host database user 0.0.0.0/0 password
# IPv6 local connections:
host all all ::1/128
scram-sha-256
# IPv6 connections from internet:
host database user ::0/0 scram-sha-256
host database user ::0/0 md5
host database user ::0/0 password
# Allow replication connections from localhost, by a user with the
# replication privilege.
local replication all
```

Since I know a Java and I know Idea uses java, so I wrote this small
snippet to try to connect to my server using JDBC:
```java
public class Test {
public static void main(String[] args) throws SQLException {
Connection connection = DriverManager.getConnection(
"jdbc:postgresql://url/database",
"user",
"password"
);

try (connection) {
Statement statement = connection.createStatement();
statement.execute("select version()");
}
}
}
```
And it failed with the same error