stock ShowLoginScreen(playerid)
{
    new string[100];
    format(string, sizeof(string), "{6EF83C}Welcome back %s\nBefore playing you must login\nEnter your password below and click login",PlayerName(playerid));
    ShowPlayerDialog(playerid,DIALOG_LOGIN,DIALOG_STYLE_INPUT,"{6EF83C}Login required",string,"Login","Cancel");
}

stock ShowRegisterScreen(playerid)
{
    new string[100];
    format(string, sizeof(string), "{6EF83C}Welcome to the Sfrcnr{F81414} %s\nYou need to create an account before playing",PlayerName(playerid));
    ShowPlayerDialog(playerid,DIALOG_REGISTER,DIALOG_STYLE_INPUT,"{F81414}Registration required",string,"Register","Cancel");
}

La OnPlayerConnect
    if(udb_Exists(PlayerName(playerid)) && !PLAYERLIST_authed[playerid]) {
    ShowLoginScreen(playerid);
    return 0;
}
    if(!udb_Exists(PlayerName(playerid)) && !PLAYERLIST_authed[playerid]) {
    ShowRegisterScreen(playerid);
    return 0;
}


sh la OnDialogResponse

if(dialogid == DIALOG_LOGIN)
    {
        if (response == 0)
        {
            SendClientMessage(playerid,COLOR_ERROR,"You must login before playing on this server.");
            ShowLoginScreen(playerid);
            return 1;
        }
        if (response == 1)
        {
            if (strlen(inputtext) == 0)
            {
                SendClientMessage(playerid,COLOR_ERROR,"Please enter your password for your account in the box below.");
                ShowLoginScreen(playerid);
                return 1;
            }
            if (udb_CheckLogin(PlayerName(playerid),inputtext))
            {
                GivePlayerMoney(playerid,dUserINT(PlayerName(playerid)).("money")-GetPlayerMoney(playerid));
                PLAYERLIST_authed[playerid]=true;
                new pIp[16];
                GetPlayerIp(playerid, pIp, sizeof(pIp));
                dUserSet(PlayerName(playerid)).("IP", pIp);
                PLAYERLIST_authed[playerid]=true;
                return SendClientMessage(playerid,COLOR_GREEN,"You have successfully logged!");
            }
            ShowLoginScreen(playerid);
            CheckPasswordAttempts(playerid);
        }
        return 1;
    }
    if(dialogid == DIALOG_REGISTER)
    {
        if (response == 0)
        {
            SendClientMessage(playerid,COLOR_ERROR,"You must register before playing on this server.");
            ShowRegisterScreen(playerid);
            return 1;
        }
        if (response == 1)
        {
            if (udb_Exists(PlayerName(playerid)))
            {
                SendClientMessage(playerid,COLOR_ERROR,"This account already exists, please choose a different player name.");
                return 1;
            }
            if (strlen(inputtext)==0)
            {
                SendClientMessage(playerid,COLOR_ERROR,"Please enter your password in the box to register in this server.");
                ShowRegisterScreen(playerid);
                return 1;
            }
            if (udb_Create(PlayerName(playerid),inputtext))
            {
                SendClientMessage(playerid,COLOR_GREEN,"Congratulations!You have registered,now please enter your password in the box to login.");
                ShowLoginScreen(playerid);
                dUserSetINT(PlayerName(playerid)).("money",7500);
                new pIp[16];
                GetPlayerIp(playerid, pIp, sizeof(pIp));
                dUserSet(PlayerName(playerid)).("IP", pIp);
            }
            return true;
        }
        return 1;
    }