changed firebase storage folder name. now includes uid's

lib/AddPage.dart

@@ -129,12 +129,18 @@ class _AddScreenState extends State<AddScreen> {
 
   Future<String> uploadImageToFirebaseStorage(
       File imageFile, String collectionName) async {
+    String? userId = FirebaseAuth.instance.currentUser?.uid;
+    if (userId != null) {
       Reference ref = FirebaseStorage.instance
           .ref()
-        .child("$collectionName/${DateTime.now().toString()}");
+          .child("$collectionName/$userId/${DateTime.now().toString()}");
       UploadTask uploadTask = ref.putFile(imageFile);
       return await (await uploadTask).ref.getDownloadURL();
+    } else {
+      throw Exception('Cannot upload without user ID');
     }
+  }
+
 
   @override
   Widget build(BuildContext context) {
@@ -248,7 +254,8 @@ class _AddScreenState extends State<AddScreen> {
                   ? Expanded(
                       child: LayoutBuilder(
                         builder: (context, constraints) {
-                    double imageHeight = max(0, constraints.maxHeight - keyboardHeight);
+                          double imageHeight =
+                              max(0, constraints.maxHeight - keyboardHeight);
                           return Container(
                             height: imageHeight,
                             child: Image.file(_imageFile!),
@@ -256,7 +263,6 @@ class _AddScreenState extends State<AddScreen> {
                         },
                       ),
                     )
-
                   : Container(
                       height: 200.0,
                       decoration: BoxDecoration(