ActiveRecord可以远程连接到PostgreSQL并保护数据库密码吗？

gem 'pg'

default: &default
  adapter: postgresql
  encoding: unicode
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  timeout: 5000

development:
  <<: *default
  database: my_database_development
  username: my_username
  password: <%= ENV['MY_DATABASE_PASSWORD'] %>
  host: localhost
  port: 5432

test:
  <<: *default
  database: my_database_test
  username: my_username
  password: <%= ENV['MY_DATABASE_PASSWORD'] %>
  host: localhost
  port: 5432

production:
  <<: *default
  database: my_database_production
  username: my_username
  password: <%= ENV['MY_DATABASE_PASSWORD'] %>
  host: <%= ENV['MY_DATABASE_HOST'] %>
  port: <%= ENV['MY_DATABASE_PORT'] %>

rails generate model User name:string email:string
rails generate migration CreateUsers

user = User.new(name: 'John Doe', email: 'john@example.com')
user.save