Struggling with export

I’m not sure if the exports work or if i’m doing something wrong…

I have 2 resources, i want to get the value from resource 1 in resource 2. (let’s name the resources res1 and res2 as an example)

file res1/client.lua

local PlayerIsCop = true

function checkIfPlayerIsCop()
return PlayerIsCop
end

file res1/__resource.lua

resource_manifest_version ‘44febabe-d386-4d18-afbe-5e627f4af937’

client_script ‘client.lua’
export ‘checkIfPlayerIsCop’

in the other resource file : res2/client.lua

local isCop = exports.res1:checkIfPlayerIsCop()

i always get an error: No such export checkIfPlayerIsCop in resource res1