[API] Do action as an other user

Hello,

I use the API through an "admin" account to do not have to manage all GLPI token of each users.

I can't find out how to do action "as a specific user". Even if I force some parameters, actions are done with my admin account.

Is it possible to add a new function to do action as an other user (if I have the right to do this of course) or to change my active user for another ?

Thanks

Reagrds