Ezt hogyan javítsam ki?

De itt az egész kód rész:

function mdcLoginServer(username, password)

local source = client

dbQuery(

function (queryHandler)

local result, numAffectedRows, errorMsg = dbPoll(queryHandler, 0)

--local faction = dbQuery(queryHandler, "SELECT frakcio FROM mdcaccounts where username = ? AND password = ?", username, password)

--local frakcio = mysql:query_fetch_assoc("SELECT frakcio FROM mdcaccounts WHERE username = '" .. username .. "' AND password = '" .. password .. "'")

if numAffectedRows > 0 then

for _, row in ipairs(result) do

frakcio = row["frakcio"]

end

triggerClientEvent(source, "loginMdcClient", source, frakcio)

else

exports.mta_notifications:createNotification(root, "Hibás felhasználónév/jelszó.", 2)

end

end,

connection,

"SELECT * FROM mdcaccounts WHERE username = ? AND password = ?", username, password

)

end