How to get single user who has logged in

Hii, I am trying to get single user who has logged in using react ionic with redux…but unable to do so.
passing id but not working. so please tell me. how to get the single user who has logged in.
Please tell me the steps.
I am giving some images.
I don’t want to display all the users. Plan is to send the user to the register page to update it’s details if it is not updated. If it is updated then to send the user to the dashboard and to show its account details.
which can only be done with id according to me…or there is some other way to do it.