How to access postgresql database as readonly?

Want to access a psql database as readonly?
Following are the steps:

1. Login to the database:

   psql -d yourdbname

2. Create a user:

   CREATE USER username WITH ENCRPTED PASSWORD 'yourpassword';

3. Assign privilege select to the user:

   GRANT SELECT ON ALL TABLES IN SCHEMA public TO username;

4. Update pg_hba.conf file:

   Open pg_hba.conf file, it shall be available in /etc/postgres//main
   Add lines for new user as shown below
   

5. Restart postgres

   Restart using command systemctl restart postgresql.service
   Using pg_lsclusters command check if service started OK.

6. Check if new user can login:

   Login to psql using command psql -d yourdbname -U username