For example, we create a rankup leveling system which is automatic.
It has the main functions but the most importat is the following: level-up-automatic. If it has that option to true, the maxlevel command will be disabled and /rankup instead of ranking up, it will display your rankup. If the option is set to false, the /maxlevel (/maxrank in this case) will be enabled and /rankup or /rankup <amount> will level up your rank.