Here one

local serialWhitelist = {
    ["ABFC4A644C3626943605B2CEB8BBDEA4"] = true,
    ["D5BC93F999615831F22B40F122D19B53"] = true,
}

saves = {}

local dbConnection = dbConnect("mysql", "dbname=DayZ;host=127.0.0.1", "DayZ", "6lYKL8aTTiacQwzj")
if(dbConnection ~= false)then
    outputServerLog("Successfully connected to MySQL!")
else
    outputServerLog("Failed to connect to MySQL!")
end

addEventHandler("onResourceStart", resourceRoot,
    function()
        setGameType ("DayZ | Base Building for Free | and more")
        resetMapInfo()
        for i,player in ipairs(getElementsByType("player")) do
            spawn(player)
        end
    end
)

function check(player)
    qr = dbQuery(dbConnection, "SELECT * FROM users")
    result = dbPoll(qr, -1)
    for v,k in ipairs(result) do
        if k['Name'] == getPlayerName(player) then
            triggerClientEvent(player,"enableLogin",player)
            return
        end
    end
    if string.find(getPlayerName(player), "'") then
        kickPlayer(player,"Remove ' from your Nick")
        return
    end
    if string.find(getPlayerName(player), "#%x%x%x%x%x%x") then
        kickPlayer(player,"Remove Colors from your Nick")
        return
    end
    triggerClientEvent(player,"enableRegister",player)
end
addEvent("checkifRegisteredorleggedIn",true)
addEventHandler("checkifRegisteredorleggedIn",root,check)

function login(username, password)
    local qh = dbQuery(dbConnection, "SELECT Name,password FROM users WHERE Name=? LIMIT 1", username)
    local result = dbPoll(qh, -1)
    result = result[1]
    local client = getPlayerFromName(result["Name"])
    if client == false then return end
    if client then
        if(md5(password) == result["password"])then
            local grt = getRealTime()
            local loginTime = (grt.monthday).."."..(grt.month+1).."."..(grt.year+1900)
            dbExec(dbConnection, "UPDATE users SET lastLogin=? WHERE Name=?",tostring(loginTime),username)
            triggerEvent("onPlayerDayZLogin", client, username, password, client)
            dbFree(qh)
            return true
        end
        dbFree(qh)
        return false
    else
        dbFree(qh)
        return false
    end
    dbFree(qh)
    return false
end

function onPlayerDayZLogin(username, password)
    if(login(username, password))then
        triggerClientEvent(source, "onPlayerDoneLogin", source)
        triggerClientEvent(source, "loginMSG", source,"[Login]#FF9900 Successfully logged in!")
    else
        triggerClientEvent(source, "loginMSG", source,"[Login]#FF9900 Wrong password or username")
        triggerClientEvent(source, "loginMSG", source,"[Login]#FF9900 Try /changepw [New Password]!")
    end
end
addEvent("onPlayerDayZLogin1", true)
addEventHandler("onPlayerDayZLogin1", getRootElement(), onPlayerDayZLogin)

function onPlayerLauncherLogin(teaCode)
    local json = fromJSON(teaDecode(teaCode, "infinityz_secure_7432185"))
    local action = json["Action"]
    local username = json["Account"]
    local password = json["Password"]
    if(action == "login")then
        if(login(username, password))then
            setTimer(triggerClientEvent, 3500, 1, source, "onPlayerDoneLogin", source)
            triggerClientEvent(source, "loginMSG", source,"[Login]#FF9900 Successfully logged in!")
        else
            triggerClientEvent(source, "loginMSG", source,"[Login]#FF9900 Wrong password or username!")
            triggerClientEvent(source, "loginMSG", source,"[Login]#FF9900 Try /changepw [New Password]!")
            triggerClientEvent(source, "enableLogin", source, false)
        end
    elseif(action == "register")then
        if(register(username, password))then
            setTimer(triggerClientEvent, 3500, 1, source, "onPlayerDoneLogin", source)
            triggerClientEvent(source, "loginMSG", source,"[Login]#FF9900 Successfully logged in!")
        else
            triggerClientEvent(source, "enableRegister", source, false)
            triggerClientEvent(source, "loginMSG", source,"[Login]#FF9900 This account already exists!")
        end
    end
end
addEvent("onPlayerLauncherLogin", true)
addEventHandler("onPlayerLauncherLogin", getRootElement(), onPlayerLauncherLogin)

function register(username, password)
    local player = getPlayerFromName(username)
    local pserial = getPlayerSerial(player)
    local aallow = true
    qr = dbQuery(dbConnection, "SELECT * FROM users")
    result = dbPoll(qr, -1)
    for v,k in ipairs(result) do
        if k['Name'] == username or k['serial'] == pserial then
            aallow = false
            return false
        end
    end

    if aallow == true then
        local grt = getRealTime()
        local loginTime = (grt.monthday).."."..(grt.month+1).."."..(grt.year+1900)
        dbExec(dbConnection, "INSERT INTO users (Name,lastLogin,serial,password) VALUES (?,?,?,?)",username,tostring(loginTime),pserial,md5(password))
        triggerEvent("onPlayerDayZRegister", player, username, password, player)
        dbFree(qr);
        return true
    else
        return false
    end
end

function onPlayerDayZRegister(username, password)
    if(register(username, password))then
        triggerClientEvent(source, "onPlayerDoneLogin", source)
        triggerClientEvent(source, "loginMSG", source,"[Login]#FF9900 Successfully logged in!") -- <- Change the message
    else
        triggerClientEvent(source, "loginMSG", source,"[Login]#FF9900 This account already exists!")
    end
end
addEvent("onPlayerDayZRegister1", true)
addEventHandler("onPlayerDayZRegister1", getRootElement(), onPlayerDayZRegister)

addEventHandler("onPlayerConnect", getRootElement(), function(playerNick, playerIP, playerUsername, playerSerial)
    local qr = dbQuery(dbConnection, "SELECT * FROM users WHERE serial=? LIMIT 1", playerSerial)
    local result, num_affected_rows, last_insert_id = dbPoll(qr, -1)
    result = result[1]
    if(result["serial"] == playerSerial)then
        if(result["Name"] ~= playerNick)then
            cancelEvent(true, "Please connect with name '"..result["Name"].."'!")
        end
    end
    dbFree(qr)
end)