Impossible to connect to Postgresql using RubyMine - postgresql

Question

I've been trying to connect to PostgreSQL using RubyMine but it's always asking for a password.
In a terminal I do connect using:
psql -U postgres
I don't have to input a password.
But, when I tried using RubyMine to connect to PostgreSQL is always asking for a password. I tried input some passwords but they don't work. Any idea?
My settings file:
default: &default
adapter: postgresql
encoding: unicode
# For details on connection pooling, see rails configuration guide
# http://guides.rubyonrails.org/configuring.html#database-pooling
pool: 5
development:
<<: *default
database: portafolio_development
username: postgres
password:
test:
<<: *default
database: portafolio_test
username: postgres
password:
production:
<<: *default
database: portafolio_production
username: portafolio
password: <%= ENV['PORTAFOLIO_DATABASE_PASSWORD'] %>
Edited
My pg_hba.conf:
local all postgres peer
# 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 md5
# IPv6 local connections:
host all all ::1/128 md5
# Allow replication connections from localhost, by a user with the
# replication privilege.
#local replication postgres peer
#host replication postgres 127.0.0.1/32 md5
#host replication postgres ::1/128 md5
Solved
Result that I have two pg_hba.conf files. One for version 9.3 and another for 9.4. I changed the first one to the following and everything is working now:
local all postgres trust
# The same using local loopback TCP/IP connections.
#
# TYPE DATABASE USER ADDRESS METHOD
host all all 127.0.0.1/32 trust
# The same as the previous line, but using a separate netmask column
#
# TYPE DATABASE USER IP-ADDRESS IP-MASK METHOD
host all all 127.0.0.1 255.255.255.255 trust
# The same over IPv6.
#
# TYPE DATABASE USER ADDRESS METHOD
host all all ::1/128 trust
# The same using a host name (would typically cover both IPv4 and IPv6).
#
# TYPE DATABASE USER ADDRESS METHOD
host all all localhost trust