Postgresql error when running rails Server -

so, i'm learning how code pulling repository account. however, when try run rails s error:

pg::connectionbad - fatal: password authentication failed user "postgres" fatal: password authentication failed user "postgres"

i have clean install of postgresql , can't figure out do. in advance.

ahhh... turns out i've put in wrong port number. responding 1 specified in database.yml. port 5432 , changed 3000 , worked.