How to refresh /dev/kvm without OS reboot?

Question

ubuntu

hello.
I have ubuntu 18.04 installed
android studio of the latest version . no rights. I solve the problem like this: I install the missing package sudo apt install qemu-kvm , then I add my user to the kvm group , I restart android studio, the same error still returns. The error disappeared only after restarting the OS. Please tell me how to update the rights for the user without restarting the OS?