(google)Translated:
I have the same problem when installing my cms takes my mysql password in the file hosted on mencioan q. it can be?
Depends how you install the cms. You can create a mysql user or if the cms installer creates one for you, you can do that during the installation process.
You can use mysql root account but it is advised to use a different mysql account than 'root' for applications that use mysql since when your application gets compromised, your whole server will be compromised with root user.
Creating a new mysql user can be done using the mysql console or for instance install phpmyadmin (not advised to be accessible from the internet)