docs: def grant_user(userid, vswitch_name):
      """ Grant user.
  
      Input parameters:
      :userid:            USERID of the guest, last 8 if length > 8
      :network_info:      dict of network info
      """
      print("\nGranting user %s ..." % userid)
      user_grant_info = client.send_request('vswitch_grant_user', vswitch_name, userid)
  
      if user_grant_info['overallRC']:
          raise RuntimeError("Failed to grant user %s!" %userid)
      else:
          print("Succeeded to grant user %s!" % userid)