help in script

[nasserdfdd]

hi all so i have this script toe change veh mod for admin buti get error

server

function permission (source) 
local accName = getAccountName ( getPlayerAccount ( source ) ) 
     if isObjectInACLGroup ("user."..accName, aclGetGroup ( "Admin" ) ) then 
end 
end 
addEvent("check",true) 
addEventHandler("check",root,permission) 

client

function enterveh () 
    triggerServerEvent("check",localPlayer) 
    txd = engineLoadTXD("infernus.txd", 411 ) 
    engineImportTXD(txd, 411) 
    dff = engineLoadDFF("infernus.dff", 411 ) 
    engineReplaceModel(dff, 411) 
end 
addEventHandler ( "onClientPlayerVehicleEnter", getRootElement(), enterveh ) 

it give me Error:test\server.lus:3: attemept to concatentate local 'accname'(a boolean value)

[KariiiM]

addEvent("check",true) 
addEventHandler("check",root, 
   function (thePlayer) 
   local accName = getAccountName ( getPlayerAccount ( thePlayer )) 
   if isObjectInACLGroup ( "user."..accName, aclGetGroup ( "Admin" ) ) then 
   end 
end) 

[nasserdfdd]

does not have error and the shader does not change

[xeon17]

  
-- Server 
  
local acls = {"Console", "Admin"} 
  
addEventHandler('onVehicleEnter', root, 
function (thePlayer) 
    if not (isAllowedPlayer(thePlayer)) then 
        return 
    end 
     
    triggerClientEvent(thePlayer,'replaceMod',thePlayer) 
end) 
  
-- Utils functions 
function isAllowedPlayer(player) 
    local account = getPlayerAccount(player) 
    if (not account or isGuestAccount(account)) then return false end 
    local accountName = getAccountName(account) 
    for i, v in pairs (acls) do 
        if ( isObjectInACLGroup ( "user.".. accountName, aclGetGroup (v))) then 
            return true 
        end 
    end 
    return false 
end 
  
-- Client side 
addEvent("replaceMod",true)  
addEventHandler("replaceMod", root,  
function() 
     txd = engineLoadTXD("infernus.txd", 411 ) 
     engineImportTXD(txd, 411) 
     dff = engineLoadDFF("infernus.dff", 411 ) 
     engineReplaceModel(dff, 411) 
end)