I have a !addcom command and everything,

But is there a way to make a @user@ & @target@ tag

What the @user@ tag would do:

It would replace it with the name of who the command was said to for example
!cookie @target@ gave @user@ a cookie

What the @target@ tag would do:
Would be replaced with the name of the user that did the command.

I know you can just code a command like this but i want it so i can do it with !addcom so like:
!addcom !cookie @target gave @user@ a cookie.

How would i do this?