how to make a user superuser in postgres code example

Example 1: postgres create user with superuser privileges

sudo -u postgres createuser -s -i -d -r -l -w <<username>>
sudo -u postgres psql -c "ALTER ROLE <<username>> WITH PASSWORD '<<password>>';"

Example 2: postgresql change user role grant

=# ALTER USER librarian WITH SUPERUSER;
ALTER ROLE

Example 3: postgresql change user role grant

=# ALTER USER role_specification WITH OPTION1 OPTION2 OPTION3;