Redmine

Hi
I'm sorry to ask , but i searched with no good informations about a question.

In a website i add issues in redmine after some forms are submited. Very often the person who fill the form is already connected to redmine (in is browser). His user is not the "rest api user",

i'm wondering if it possible to check by the rest api if there is already an user connected ?

Hope my answer is clear enough ?

Thanks
eric