added pin file check

scripts/tginput.sh

@@ -24,6 +24,10 @@ lock_tg(){
 }
 
 readpin(){
+	if [[ ! -f ~/.local/.tgpin.txt ]]; then
+		echo "Error: PIN file not found!"
+		exit 1
+	fi
 	tgpin=$(cat ~/.local/.tgpin.txt)
 }
 
@@ -37,9 +41,9 @@ if [ "$1" == "lock" ]; then
 	lock_tg
 	return_mouse
 elif [ "$1" == "unlock" ]; then
+	readpin
 	get_tg_window_id
 	get_mouse_location
-	readpin
 	unlock_tg
 	return_mouse
 else