If you are starting in the VoIP world, you may have found FusionPBX as one of the best FreeSWITCH front ends in the market. However, installing it sometimes is tricky. OKay has developed a 5-minute installation process.
The default database details are only to allow you to make a fast installation. The fusionpbx username is only accessible through the local host and it only has privileges on the fusionpbx and freeswitch databases. If you are familiar with MariaDB database management, you can create your own user and delete the default one.
Please report any problem when installing.