How to install, config and create a superuser on postgresql fedora

create_superuser_postgresql.sh

#Login as root
su -
#Switch to postgres user
su postgres
#Connect to the DB
psql
#Create user
CREATE USER username SUPERUSER INHERIT CREATEDB CREATEROLE; 
#Alter it`s password
ALTER USER username PASSWORD 'password'; 

install_postgresql_fedora.sh

#Install postgresql
sudo dnf install postgresql-server postgresql-contrib postgresql-devel
#Init DB
sudo postgresql-setup --initdb
#Init Service
sudo systemctl start postgresql
#Service init every boot
sudo systemctl enable postgresql

pg_hba.conf

# Edit the file /var/lib/pgsql/data/pg_hba.conf to look like this
# After that the service should be restarted
# sudo systemctl restart postgresql
#
# TYPE  DATABASE        USER            ADDRESS                 METHOD
local   all             postgres                                peer
host    all             all             127.0.0.1/32            md5
host    all             all             ::1/128                 md5