[TYPO3] How to get the FE user Id from Typoscript

[Laurent Signorini]

Hello,

I try to get the FE user from typoscript.
I use the following Typoscript :

   5 = TEXT
   5.insertData = 1
   5.value = {TSFE:fe_user:user:id}

But it doesn't work.
Thank you for helping me.

Laurent