Create readonly user on postgres database

postgres_create_readonly_user.sql

-- Before running below script make sure you
-- are connected to the correct database
-- you want to grant readonly access to

-- Create a group
CREATE ROLE readaccess;

-- Grant access to existing tables
GRANT USAGE ON SCHEMA public TO readaccess;
GRANT SELECT ON ALL TABLES IN SCHEMA public TO readaccess;

-- Grant access to future tables
ALTER DEFAULT PRIVILEGES IN SCHEMA public GRANT SELECT ON TABLES TO readaccess;

-- Create a final user with password
CREATE USER {{username}} WITH PASSWORD '{{password}}';
GRANT readaccess TO {{username}};