First of all you need to ensure you have your Active Directory attached and synchronize (presuming you are using AD authentication). Has this step been done?
There was a gotcha in the set up under User Directory Connector (which I am not sure if it has been fixed) where you had to ensure that the "Fetch User Data On First Access and Then Keep In Sync" option is not ticked.
Once this has been done you can search for the user and grant them privileges and you can also allocate them user tokens.
Hope that helps
Hello Mohit - this is a repeated question, that I have already responded to here: Re: How to add & Create new users in qliksense QMC
Please let us know how you do and please refrain from asking duplicated questions.
Thanks for your cooperation.