PG :: ConnectionBad fe_sendauth：未提供密码

Question

Disclaimer: I'm very new to programming in general, so please excuse my sizeable ignorance. I'm trying to run an application I've written in rails, but when I do, I get the error "fe_sendauth: no password supplied".
Here's my database.yml, I have a feeling it's something in here.

default: &default
    adapter: postgresql
    pool: 5
    timeout: 5000

development:
  <<: *default
    database: url-shortener_development

test:
  <<: *default
  database: url-shortener_test

production:
  <<: *default
  database: url-shortener_production
  username:
  password:

Answer 1

Change this,

local   all             all                                     trust

to,

local   all             all                                     md5

and create a super_user in PostgreSQL with username and password , and add that username and password to your database.yml file

Answer 2

Please do some changes in database.yml

development:

  adapter: postgresql
  encoding: unicode
  database: database-name
  pool: 5
  username: ####  your pg username
  password: ####  your pg password