How can I solve "chown: invalid user:"

I installed Android Studio (ver 3.4). When I created AVD, it shows me a warning: /dev/kvm device: permission denied. Troubleshoot. I push "Troubleshoot", then it shows grant current user access to /dev/kvm. I tried sudo adduser "user" or sudo chown "user" /dev/kvm, but it did not work and return "invalid user" or some error?

How can I solve this problem?

1 Answer

Install kvm using command

sudo apt install qemu-kvm

then execute these commands

sudo adduser $USER kvm
sudo chown $USER /dev/kvm

restart system once done