I would like to know how to create commands as a mod for someone

@Jumpy Chick Hi,

Ask the owner of the channel to cross check if the default command "!commands" is enable.

From docs: "!commands" allows users to get a list of commands and moderators to manage commands.

To add command via chat:

md
!addcom <command name> <command response>

Example:

md
!addcom hi Hello

You can make the response much more dynamic with built in variables

md
!addcom hi Hello @$(user). 

If you know little bit of JavaScript you can do "miracles". Here's the "!facts" command

js
!addcom !facts Fact: $(eval a = $(urlfetch json https://pastebin.com/raw/x0vgXCwJ); a[Math.floor(Math.random() * a.length)])

To delete command:

md
!delcom <command name>

Example:

md
!delcom !facts

There are lot many things. Consider looking at https://docs.nightbot.tv/

Regards