public OnPlayerConnect(playerid)
{
    new name[MAX_PLAYER_NAME], file[128];
    GetPlayerName(playerid, name, sizeof(name));
    format(file, sizeof(file), SERVER_USER_FILE, name);
    if (!dini_Exists(file))
    {
        new string[128], playername[MAX_PLAYER_NAME];
        GetPlayerName(playerid, playername, sizeof(playername));
        format(string, sizeof(string), "The username %s is not in the datebase please register", playername);
	SendClientMessage(playerid, White, string);
	ShowPlayerDialog(playerid, 1, DIALOG_STYLE_INPUT, "Account", "Register account\n\nEnter password:", "Register", "Quit");
    }
    if(fexist(file))
    {
        ShowPlayerDialog(playerid, 2, DIALOG_STYLE_INPUT, "Account", "Login to your account\n\nEnter your password:", "Login", "Quit");
        new string[128], playername[MAX_PLAYER_NAME];
        GetPlayerName(playerid, playername, sizeof(playername));
        format(string, sizeof(string), "The username %s is registered login to your account", playername);
	SendClientMessage(playerid, Green, string);
    }
	return 1;
}