CB Auto Action Redirect

I am trying to use CB AA redirect to send a public guest to a different URL when a profile link is clicked.
The url looks like:
index.php?option=com_comprofiler&view=userprofile&user=2721&Itemid=148

I want to grab the user=2721 from the url and add to the redirect url.

index.php?option=com_something&user=2721

I have tried variations on index.php?option=com_something&user=[cid] etc.. as well as different user settings on the global tab.

Just need to grab the user from the initial url and plug into the redirection url.

I figured it out. I can use the [get_user] to get the variable from the url.