diff --git a/packages/auth_server.lua b/packages/auth_server.lua
index 2679ecc..d9bb380 100644
--- a/packages/auth_server.lua
+++ b/packages/auth_server.lua
@@ -1,6 +1,6 @@
 
 
-data = {
+local data = {
     users = {
         ["admin"] = {
             password = "admin"
@@ -53,6 +53,14 @@ function log(str)
     io.write("[" .. os.time() .. "] " .. str .. "\n")
 end
 
+function countElements(table)
+    local count = 0
+    for key, value in pairs(table) do
+        count = count + 1
+    end
+    return count
+end
+
 load_data()
 math.randomseed(os.time())
 
@@ -77,7 +85,7 @@ while true do
             password = convert_password(request.password)
         }
         
-        local user_count = #data.users
+        local user_count = countElements(data.users)
         if user_count == 1 then
             data.users[request.username].groups = {
                 ["admin"] = true