[gabr1ell]

Well the error is clear you do not have access, from what I am seeing you are trying to use a local mysql if it is xamp (Windows) the default is this:

"sourcebans"
{
"driver" "mysql"
"host" "localhost"
"database" "YOUDATABASE"
"user" "root"
"pass" ""
// "timeout" "0"
// "port" "3306"
}

If it is linux I recommend checking the login and password again or uninstalling and installing again checking the password!