added folders to organize files

functions/handlers/users.js

@@ -0,0 +1,33 @@
+exports.getUserDetails = (req, res) => {
+    let userData = {};
+    db.doc('/users/${req.params.handle}').get().then((doc) => {
+            if (doc.exists) {
+                userData.user = doc.data();
+                return db.collection('post').where('userHandle', '==', req.params.handle)
+                    .orderBy('createdAt', 'desc').get();
+            } else {
+                return res.status(404).json({
+                    error: 'User not found'
+                });
+            }
+        })
+        .then((data) => {
+            userData.posts = [];
+            data.forEach((doc) => {
+                userData.posts.push({
+                    body: doc.data().body,
+                    createAt: doc.data().createAt,
+                    userHandle: doc.data().userHandle,
+                    userImage: doc.data().userImage,
+                    likeCount: doc.data().likeCount,
+                    commentCount: doc.data().commentCount,
+                    postId: doc.id
+                });
+            });
+            return res.json(userData);
+        })
+        .catch((err) => {
+            console.error(err);
+            return res.status(500).json({ error: err.code});
+        });
+};