Make the command register something in the Configuration

Hello, I would like to know how I can make a command that registers something in the Configuration File, such as: /test register 1 , and then 1 is registered in a part of the configuration.

 

In pmmp are not api method for this, but you can use AvailableCommandsPacket

 

Out of context! He's just asking how to save "any" argument in "any" way inside "any" config file, which I assume must be one provided by Config and not TOML.