View difference between Paste ID: RGmh55Hx and iRgfjUZL

 rednet.open("top")
 
 local names={}
 local f=fs.open("/card-index","r")
 if f then
 
 local s=f.readLine()
 while s do
 for name,pass in string.gmatch(s,"(.-)|(.-)|") do
 print(name,"|",pass)
 names[name]=pass
 end
 s=f.readLine()
 end
 f.close()
 end
 
 while true do
   local id,data=rednet.receive()
 
   if data:sub(1,11)=="CARD|CHECK|" then
     local ok=false
     print("Checking "..data:sub(11).." from id "..id)
     for name,pass in string.gmatch(data:sub(11),"|(.-)|(.-)|") do
       for k,v in pairs(names) do
         if k==name and v==pass then
           ok=true
           break
         end
       end
     end
     print(ok)
     if ok then rednet.send(id,"CARD|OK") else
       rednet.send(id,"CARD|BAD")
     end
-  elseif data:sub(1,8)=="CARD|ADD|" then
+  elseif data:sub(1,9)=="CARD|ADD|" then
-    print("adding card " .. data:sub(8).. " from id "..id)
+    print("adding card " .. data:sub(9).. " from id "..id)
     local f=fs.open("/card-index","a")
-    f.write(data:sub(9))
+    f.write(data:sub(10))
   elseif id~=176 then print(data) end
 end