How to Add user permission in Proxmox

Create a user

# useradd user100

# passwd user100

//password

//give your password twice

Go to GUI in root mode.

Datacenter -> users -> Add ->

     type user100  and press Add button

Select particular VM you want to set permission

go to Permission -> Add User Permission

     user -  user100

set your privilege like PVE Auditor or Administrator etc...

then press Add button

now check logout and login as well.