phpMyAdmin – from “source”

Get latest version

wget https://files.phpmyadmin.net/phpMyAdmin/4.4.14/phpMyAdmin-4.4.14-all-languages.zip

Unzip in /var/www/pma

Create config file

cp config.sample.inc.php config.inc.php

Create phpmyadmin db

mysql < create_tables.sql

Create user 

mysql -e "GRANT SELECT, INSERT, DELETE, UPDATE ON phpmyadmin.* TO 'pmaadmin'@'%' IDENTIFIED BY '<PASS>'"

Enable parts related to the db, username and pw from above

vim config.inc.php

Create configuration file (copy and paste the whole command):

cat > /etc/httpd/conf.d/phpMyAdmin.conf <<EOF
Alias /phpMyAdmin /var/www/html/pma
Alias /phpmyadmin /var/www/html/pma

<Directory /var/www/html/pma/>
     AuthType Basic
     AuthName "Restricted"
     AuthUserFile /etc/phpMyAdmin/.htpasswd
     Require valid-user
</Directory>
EOF

Create auth file

htpasswd -c  /etc/phpMyAdmin/.htpasswd admin
(FYI 'admin' it's the username)

To ADD users, just remove the -c flag