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new MGuard;

public OnPlayerConnect(playerid)

if(MGuard == 0)
{
ShowPlayerDialog(playerid, DIALOG_LOGIN, DIALOG_STYLE_INPUT, "Login", "Put MGuard code below", "Unlock", "Cancel");

SendClientMessage(playerid, COLOR_RED, "Mode is locked by MGuard, put a code in order to unlock it.");
 if(MGuardCode != DIALOG_LOGIN) { SendClientMessage(playerid, -1, "Wrong MGuard Code!");}