Genuine authentication failures and related problems generally
manifest themselves through error messages like the following.
No pg_hba.conf entry for host 22.214.171.124, user andym, database testdb
This is what you are most likely to get if you succeed in contacting
the server, but it does not want to talk to you. As the message
suggests, the server refused the connection request because it found
no authorizing entry in its pg_hba.conf
Password authentication failed for user 'andym'
Messages like this indicate that you contacted the server, and it is
willing to talk to you, but not until you pass the authorization
method specified in the pg_hba.conf file. Check
the password you are providing, or check your Kerberos or ident
software if the complaint mentions one of those authentication
FATAL 1: user "andym" does not exist
The indicated user name was not found.
FATAL 1: Database "testdb" does not exist in the system catalog.
The database you are trying to connect to does not exist. Note that
if you do not specify a database name, it defaults to the database
user name, which may or may not be the right thing.
Note that the server log may contain more information about an
authentication failure than is reported to the client. If you are
confused about the reason for a failure, check the log.